When choosing pipes, it is worth considering that the Mapress series press connections are designed for pressures up to 16 bar, and Mepla - for operating pressure, not exceeding 10 bar.
Fast, safe and neat installation
Construction technology with Geberit systems is significantly superior traditional methods laying pipelines using welding, threading and soldering. It requires minimal preparation, and the whole process is carried out several times faster.
When starting to create pipelines based on Geberit press systems, the master first measures and cuts the pipes according to the design. Cutting can be carried out either electromechanically or hand tools. After this, the external and internal chamfers are removed, and a mark is made on the pipe where it enters the fitting. Also, the ends of each product are cleaned of burrs and irregularities in order to obtain a perfectly smooth and clean surface, which will ensure a strong connection of the joints during installation.
The pipes are fastened using the press fittings included in the Geberit system, equipped with profile sealing rings of a unique design. It is these elements that are responsible for the tightness, reliability and durability of the connection. Also during the installation process, special equipment is used that allows for adjustment of Geberit fittings:
- Geberit Mepla series pipes with a diameter of 16–26 mm are usually connected using hand tools;
- Mapress and Mepla series pipes with a diameter greater than 26 mm are fastened using electric pressing tools.
It begins with tracing the network and connecting prepared pipes using press fittings (pipes are inserted into the fitting sockets at the intended depth). Next, holding them between the crimping lips of the pressing tool, the master presses the start button, after which the compression process automatically begins. Under pressure, the press fitting, O-ring and pipe are deformed to a specific shape, forming a strong, durable and airtight connection. Having fastened two pipes together, the master installs other elements in the same way, creating a pipeline of the required length and configuration.
Benefits of using Geberit press systems
- High speed. The simplicity of pipe connection technology allows you to quickly create pipelines of any length with minimum costs time and money, which provides significant cost savings and speeds up the entire process.
- Ease of work. The use of compact and powerful special equipment makes the work as simple as possible. Moreover, it is convenient to carry them out even in hard to reach places and cramped spaces.
- Connection reliability. The use of Geberit systems and special equipment results in reliable pipelines with strong connections that are torsionally rigid and leak-tight.
- High aesthetics. In addition to their excellent performance, Geberit connections are aesthetically pleasing appearance. This is why they can be used in projects involving open pipe laying.
Currently, the drainage of rainwater and melt water from the roofs of buildings is carried out by unorganized discharge along the eaves overhangs and organized drainage of water through external and internal drains. Internal drainage systems consist of drainage (intake) funnels, risers, outlet (suspended and underground) pipelines and outlets. According to the operating principle internal systems They are divided into gravity and siphon systems.
In gravity systems, water is collected by drainage funnels and drained from the roofs due to the slope in the outlet pipelines. Pipeline calculations are performed based on their partial filling.
In siphon systems of internal drain Pluvia Swiss companies Geberit the pipeline system is completely filled with water. A continuous column of water appears from the funnel on the roof until the transition to traditional gravity sewer system. Rainwater accumulates on the roof surface to a certain level. Due to the pressure of the backing water, the water column is forced through the collection pipeline. When the water column begins to fall in the vertical riser, a reduced pressure is formed in the entire drainage system, due to which rainwater from the roof is sucked into the pipeline system.
Air should not enter the siphon storm drain system to maintain complete filling of the pipeline and the siphon effect. This is achieved through tightness and precise sizing of the pipeline system. Special design drainage funnels Pluvia and complete tightness of the joints prevent the penetration of air into the system. The funnels are equipped with a flow stabilizer that allows rainwater only from the side and without air inclusions. For drainage pipelines it is used welded piping system Geberit HDPE .
Pipes and fittings Geberit HDPE They are connected by butt welding (in hard-to-reach places - with electric welded couplings) and mounted using special fasteners and a large number of anchor supports without installing temperature compensators. Thus, the drainage system becomes completely sealed.
In light rain, the systemGeberit Pluvia operates similarly to a traditional gravity drainage system - the piping system is only partially filled with rainwater (partial filling). At heavy rain traditional gravity system internal drain continues to remain partially filled, while siphon system Geberit Pluvia completely filled with water due to the smaller diameter of the pipes (full filling). Due to this, a suction effect is created and the performance of the system increases dramatically.
Because of high performance siphon storm drain systemGeberit Pluvia large roof areas can be drained with a small number of risers, which simplifies design, reduces costs and duration construction work.
Gravity system (light rain)
Gravity system (intense rain)
System Geberit Pluvia (light rain)
System Geberit Pluvia (heavy rain)
How the system works Pluvia determines its advantages compared to the traditional system:
reducing the diameter of pipes and the number of funnels;
lack of slope of horizontal sections of drainage and pipes at the base of the building.
Due to high speed water ensures self-cleaning of pipelines. A special flow regime within the system allows you to optimize external networks and transfer releases to the required side. Usage pipes Geberit HDPE make it possible to pre-assemble system components.
Geberit Pluvia system can be used in various roofs: cold, warm, roofs with landscaping, etc. This system is most effective for large flat roofs and folded roofs with internal gutters. For both types of roofs there are various options executions, for example: non-insulated (non-insulated roof), insulated (insulated roof), insulated with vapor barrier, suitable for the movement of people and Vehicle, with landscaping.
To calculate the system it is used special program , developed by the company Geberit, - ProPlanner Pluvia . The program allows you to automatically calculate the diameters of all pipelines so that water from all areas of the roof, even those located on different levels, was vented at the same time, there was no air leakage through the funnels. The program also performs hydraulic calculations of the system. The calculation results are presented in tabular form and in the form of isometric drawings of risers. Program ProPlanner draws up a complete specification of materials required for installation.
The dimensions of the system depend on the intensity of precipitation, the dimensions of the surface and roof structure and the layout of the pipelines. When designing, it is necessary to check the roof and covering slabs for additionalloads from backwater from rainwater. This is especially true for light roofs.
When placing funnels Pluvia the following should be observed rules :
Distribute the funnels as rationally and evenly as possible:
Place the funnels at the lowest point of the roof surface;
The maximum distance between two funnels on one drainage branch should not exceed 20 m;
To prevent disruption of the functioning of the funnels, they should be placed at a distance of at least 1 m from walls, parapets, etc.
Extraneous sewage should not be directed into the systemGeberit Pluvia . Roof areas should be drained separately if the rainfall intensities are different, the area of the areas is more than 5000 m2 and/or the elevation difference is more than 4 m.
Maximum value low blood pressure in the pipeline system for pipes Geberit HDPE is:
For diameters from 40 to 160 mm - 800 mbar;
For diameters from 200 to 315 mm - 450 mbar;
With diameters from 200 mm to 315 mm (pipes P N 4) - 800 mbar.
Funnels Pluvia to drain rainwater from the roof can be directly connected to the piping system using a drain90 0 . All subsequent changes in direction to 90 0 in the pipeline system Pluvia can only be performed using two bends 45 0 .
IN in the case of non-thermally insulated roofs and especially in the case of protruding overhangs, frost protection measures are required, T. k. some areas pipelines may freeze. In such cases, the zone funnels, as well as gutters, must be protected with a self-regulating cable that de-energizes the heating ( heated funnels is in the company's assortmentGeberit ).
When the temperature difference between the gutter, roof surface and environment on pipe Geberit Pluvia Condensation may form. To prevent this, the system piping should be equipped with anti-condensation insulation.
Due to the high flow rate in the pipeline, the noise level during system operation Geberit Pluvia higher than with a traditional gravity drainage system. In buildings without special requirements to soundproofing system Geberit Pluvia can be used without additional measures. In buildings with high sound insulation requirements, noise-optimized pipe installation is achieved by preventing sound transmission to the building structure (sound separation) and optimal placement funnels and pipelines. To prevent the spread of noise through the air, pipelines are laid in special soundproofed installation channels and/or external sound insulation is carried out with using a pipe that or roll insulation.
Geberit Pluvia ends either vertically or horizontally. Next, the pipeline is completely filled ( Geberit Pluvia) goes into free-flowgravity system with partial filling (traditional gravity drainage system). To create such a transition, it is necessary to provide for an increase in the diameter of the pipeline.
Coefficient of linear thermal expansion A ForGeberit HDPE amounts to 0.2 mm/(m °C). Temperature difference? T = 50 0 C causes in caseGeberit HDPE linear expansion of the order of 10 mm per 1 m of pipeline. Temperature difference? T= -30 0 C causes linear shrinkage of the order of 6 mm per 1 m of pipeline.
Changes in the length of the pipeline system caused by temperatures must be regulated by fastening the pipeline using fixed and movable supports. Fixed supports counteract the forces caused by temperature changes and thereby regulate the longitudinal elongation of the pipeline in a certain direction. Movable supports prevent lateral deflection of the pipeline during temperature changes and bear the weight of the water-filled pipeline.
System Geberit Pluvia attached as follows:
Horizontal fastening - using the system fastenings Pluvia ;
Vertical fastening - using expansion joints;
Horizontal and vertical fastening - through rigid mounting.
For installation of horizontal sections of siphon system pipelines storm drain Geberit Pluvia the system was specially developed pipeline fastening Geberit PluviaFix . The forces caused by temperature changes in the pipes are transmitted to the anchor supports and then to the steel square profile(tire), which compensates for the resulting mechanical loads. Mounting system Geberit PluviaFix guarantees quick installation, fewer points of attachment to the roof, and the ability to pre-assemble individual components.
Internal drainage system Geberit Pluvia
A - suspension (threaded rod M10);
F - fixed support;
G - movable support;
AA - distance between pendants;
R.A. - distance between brackets;
F.A. - distance between fixed supports;
FG - weight of a fully filled suspended system.
Distance between brackets for mounting system Geberit Pluvia
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Pipe diameter |
R.A. , mm |
FG , mm |
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D , mm |
Dy , mm |
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1260 |
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2000 |
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The Geberit Pluvia internal drainage system is based on the vacuum-siphon principle. It consists of roof drains, pipes and fittings made of polyethylene low pressure(HDPE) Geberit, a sophisticated fastening system and a professional package of services technical support from the manufacturer. Thanks to its siphon effect, Geberit Pluvia ensures rapid drainage of water without requiring pipes to be sloped. Due to the high performance of the system, the number of risers and outlets can be minimized compared to a traditional system.
Geberit Pluvia - Intelligent roof drainage system
Geberit Pluvia, the most common siphon system for internal drainage, is used in different countries world for 35 years.
Geberit Pluvia For modern architecture
Thanks to its reliability and design flexibility, the Geberit Pluvia system has been the choice of engineers and architects for many years for the most significant and critical projects. Unlike gravity drainage systems Geberit Pluvia is the solution for modern architecture. Thanks to the absence of a slope in the horizontal pipelines of the Pluvia system, it becomes possible to reduce the space under the roof required for the system and implement the most daring architectural and engineering solutions.
The widest range of applications for Geberit Pluvia
The Geberit Pluvia siphon gutter system is widely used in the industrial and commercial sectors for roofs larger than 1000 m2. The operating principle and high throughput of this drainage system allow it to be used in a wide variety of applications: flat roofs, domed and arched roofs of various curvatures, inversion and green roofs with both extensive and intensive landscaping. Geberit Pluvia is used particularly effectively in projects such as factories, warehouses, shopping centers, airports, hotels, sports centers, etc.
Function of Geberit Pluvia
The Pluvia drainage system (translated from Latin as “Rain”) is based on the gravity-vacuum principle. When a column of liquid moves under the influence of gravity, a vacuum occurs, the maximum value of which is reached at the top point of the riser. The vacuum is transmitted through a horizontal collector to the water entry point - the receiving funnel. This siphon effect occurs due to the special design of the funnels and the precise calculation of pipe diameters for maximum filling with water. The operating principle of the Pluvia system determines all its advantages compared to the traditional system: a reduction in the diameter of the pipes and the number of funnels, the absence of a slope in the horizontal sections of the drain and pipes at the base of the building.
Drain funnels Geberit Pluvia
Pluvia funnel for fastening waterproofing material, with a maximum drain capacity of 6 l/s. For collecting and draining rainwater from the roof.
The Pluvia funnel, assembled, without an apron, is used for connection with any roofing sealing material. Installation is permissible with a minimum thermal insulation thickness of 12 cm. Scope of delivery: housing with horizontal release, fasteners, drain disc, flow stabilizer, protective plug, lubricants.
Pluvia funnel with flange for fastening waterproofing material, with a maximum drain capacity of 6 l/s. For collecting and draining rainwater from the roof.
Using the Pluvia funnel
- For collecting and draining rainwater from the roof
- For siphon drainage system
- For connection with roofing polymer coating
- For horizontal pipeline connection
- Do not use for flange connection roofing with fleece top layer (e.g. Rehpanol fk)
Description of the Pluvia funnel
- Outlet pipe with the possibility of direct transition to a smaller/larger diameter
- Exhaust pipe can be shortened
- Heat resistance up to 80°C
- Maintenance-free connection with sealing flange
Pluvia funnel with polystyrene insulation and apron with a maximum drain capacity of 12 l/s. For roofs with bitumen coating.
Pluvia funnel assembled, with insulation and apron, 12 l/s, used for installation on roofs without vapor barrier. For installation on roofs with vapor barriers in combination with an additional housing base. The heating element must not be installed after installation has been completed. Scope of delivery: Mounting block with integrated drain disc made of of stainless steel, insulation, flow stabilizer, protective plug.
Pluvia funnel assembly, with flange, 12 l/s
Pluvia funnel assembly, with flange for attaching waterproofing material, maximum drain capacity 12 l/s. It is used for collecting and draining rainwater from the roof. Used on roofs with a siphon drainage system.
Do not use for flange connection of roof covering with fleece top layer. Exhaust pipe with the possibility of direct conversion to a smaller/larger diameter and shortening. Heat resistance up to 80°C. Maintenance-free connection with sealing flange. Minimum drain capacity 1 l/s. Maximum height support 35 mm. Scope of delivery: Flow stabilizer, mounting flange with seal and nuts for roofing film, mounting block with integrated stainless steel drain disc, polystyrene insulation.
The Pluvia funnel assembly, with polystyrene insulation and welding flange, is used for welding into a gutter at least 35 cm wide. Installed on steel roofing. Scope of delivery: housing with metal mounting disc, insulation, flow stabilizer, protective plug.
The Geberit Pluvia funnel, for installation in a tray, is used to collect and drain rainwater from the roof.
Used for siphon drainage system. For installation on steel roofing. For installation in trays with a minimum width of 30 cm. Outlet pipe with the possibility of direct conversion to a smaller/larger diameter. Exhaust pipe can be shortened. Heat resistance up to 80°C. Maintenance-free connection with sealing flange. The maximum support height is 35 mm. Minimum drain capacity 1 l/s. Maximum drain capacity 12 l/s. Scope of delivery: Flow stabilizer, mounting flange with seal and nuts for roofing film, mounting block with integrated stainless steel drain disc.
Pluvia emergency overflow funnel, 12 l/s is used for emergency overflow on roofs equipped with Pluvia funnels with a maximum flow rate of 12 l/s. The overflow element is adjustable.
Scope of delivery: EPDM seal, two funnel fastenings made of plastic, two funnel fastenings made of metal.
Pluvia funnel assembled, with a flange for attaching waterproofing material.
Used to collect and drain rainwater from the roof. Used for siphon drainage system. The load on the funnel is no more than 150 kg. Housing with vertical outlet d 90 mm, 110 mm or 125 mm.
Scope of delivery: flow stabilizer, stainless steel apron, wing nut, protective plug.
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vendor code |
Description |
dØ [mm] |
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Pluvia funnel assembly, flow rate 25 l/s, with apron 60x60 cm and stainless steel body. become |
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Funnel Pluvia, flow rate 45 l/s, stainless steel |
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It is impossible to live in a country house without installing rainwater drainage. It performs the function of removing precipitation that forms after snow melts and precipitation falls. In its absence, water flowing down the roof forms in the form of puddles around the house.
Photo: example storm sewer
The amount of precipitation falling per year is difficult to predict. With frequent rains and snowfalls, the water around the house does not have time to go into the ground. If the area around the building is tiled, the process becomes even more complicated.
As a result, on local area water accumulates. What can happen if roof drains are not drained in a timely manner?
This may result in the following problems:
- flooding of the foundation of a residential or basement premises;
- destruction of paths that are laid on the site;
- education unpleasant odors, as a result of waterlogging of liquid;
- contamination of the coating located in the yard;
- attracting mosquitoes and other insects in the summer;
- erosion of lawns.
The presence of puddles around the house is also unpleasant because all the garbage is carried into the house. It is uncomfortable to be on the site after rain. The task of storm drainage is to promptly remove wastewater into the reservoir and prevent the development of the described problems.
You can also drain water from the roof into ravines, with the exception of areas where sanatoriums are located, beaches or swimming areas are organized, or stagnant ponds are located.
The discharge of wastewater may be associated with a mandatory requirement that includes its preliminary treatment.
Photo: main elements Kinds
It is customary to distinguish between two types of rainwater drainage:
- spot. To receive drains, they are installed, which receive water flowing down gutters leading from the roof to the surface of the ground. The system must be covered with a grill to prevent the penetration of leaves and large debris;
Sand traps are placed underground to remove soil impurities from wastewater. Such measures allow you to extend the service life of the structure and prevent it.
Photo: spot - linear. Presented in the form of trays that form a network for receiving storm water. More often used in areas where large amounts of precipitation are expected. It can be installed not only under a drainage pipe, but also along the house, mounted on an asphalt path.
Photo: linear Any type of rainwater drainage system is installed taking into account the slope. The water is discharged into a collector where waste is treated. The systems have filters to prevent clogging.
Open
Storm sewers differ in the way they remove sediment. An open or surface system is a group of trays or other containers that receive runoff and carry it off-site.
The containers that perform the function of receiving water are somewhat buried and are mounted using cement mortar. They can also be installed in blind areas, paths or other elements.
The top of the gutters is covered with gratings, which are removed if necessary. An open rain drain looks neat on the backyard area.
If you choose a decorative lattice, then the trays can be an excellent decoration for the landscape. Mostly open system install on not large areas. It is considered easy to install and not costly.
Photo: open storm drain Closed
This type involves deep drainage, the liquid is collected in special built-in products: trays, sand traps. It is then sent to storm drains and then flows through a pump into the sewer system.
After the collector, the wastewater enters treatment systems or is discharged into reservoirs. More closed system It is used in cities, but it is also applicable to private areas.
Since sewerage is more complex, its design requires certain knowledge. Installation is best done with the help of professionals. The system copes with its task perfectly, but its organization is associated with large financial costs.
Photo: closed Mixed
It is a device consisting of underground pipes and surface trays. Sediment removal occurs mainly by gravity. If the terrain does not allow them to flow independently, then pumping equipment is installed.
To lay the water supply system, choose the shortest path connecting the receiving structure with the collector or outlet point into the reservoir.
To lay the pipeline, non-pressure products are used: reinforced concrete, ceramic, asbestos-cement, plastic and concrete. Gutters that perform a drainage function are located along the entire perimeter of the building.
The sediment flowing from it ends up in the pipe. Liquid from rainwater inlets and watering installations also flows there.
A mixed type storm sewer treatment system is used in large areas or when there is a need to reduce costs.
Principle of operation
Storm drainage is designed to collect melt water and precipitation that comes from the roof. Its task is also to drain this liquid outside the site.
The principle of operation is based on collecting water at a single point, which comes from the roof or other areas where drainage structures are installed. The waste is then removed from private property via chutes or pipelines.
Thus, she performs three types of work:
- precipitation collection;
- water purification;
- waste disposal.
Photo: principle of operation of rainwater drainage The work is structured in such a way that waste is removed quickly and efficiently. As a result, the area does not become swamped; the soil dries out without having time to flood the foundation of the building.
Video: principle of operation
System design
Important! It is recommended to begin work related to the organization of rainwater drainage after finishing the foundation. It’s good when the landscaping and paving of the local area has not yet been completed.
As preparatory stage, do a vertical sprinkling of soil around the structure, followed by compaction. This avoids deformation of the system during soil shrinkage.
The installation of a shower can be divided into several stages:
- installation of equipment that collects wastewater from the roof;
- installation of elements for removing sediment from the site.
One of key points In the placement of rainwater drainage, it is considered to determine the place where the waste will be discharged and the method for carrying out this action.
Factors influencing this decision include the characteristics of the site around the building and the surrounding area. If there is a drainage ditch or a ravine nearby, then it is enough to place the pipe at an angle and the sediment will be removed.
This is the simplest and inexpensive way. A more expensive option is to collect the liquid in special wells and then drain it using a pump.
Important! It is also necessary to provide for the installation of systems for collecting rainwater in places where the tile covering is located with a contour slope or has a large area.
It is especially necessary to install such equipment at the entrance to a garage or other buildings. As a result of their action, the liquid collects quickly and puddles do not form.
It is best to install storm drains in the warm season, in the second half of summer. Duration of work for an average plot of 10 acres. on average is 1 month.
For normal functioning systems, the quality of the materials used is not as important as compliance with slopes, correct joining of elements and timely preventive actions.
Photo: compliance with slopes, correct joining of elements Terms of use
Many country property owners make mistakes when using the system. To save money, users often drain liquid from drainpipes onto blind areas.
The result of such actions is their penetration into the soil, leading to subsidence and deformation of the foundation of the house. Minimal losses in this case mean serious repairs.
Storm sewers require preventive maintenance, including cleaning. The procedure is simple and does not take much time. Maintenance consists of cleaning storm water inlets from debris and wells from silt.
Prevention is carried out 2 times a year. Regular maintenance is also required, which includes washing the trays running water, clearing storm drain baskets of debris and cleaning sand traps.
Important! Waste must not be disposed of drainage system, as this may cause the groundwater level to rise during rainfall. As a result of this error, the foundation is flooded. Poor quality processing of joints leads to the same consequences.
Photo: service Geberit
The equipment is a device that operates using the siphon principle in a vacuum system.
Its operation varies depending on the level of precipitation:
- during short periods of rain, the Geberit storm drain operates as usual;
- When there is a large amount of precipitation over a short period of time, a vacuum is formed inside the system, with the help of which water is sucked out of the funnels with high power. The speed of its movement through the pipeline can be 12 m/s.
Photo: Geberit storm drainage system What sets the gravity-vacuum system apart from conventional ones is that it easily adapts to any roof surface, making it easy to install. It has good throughput; when laying it, it is not necessary to observe a slope.
Geberit storm drainage does not require large expenditures on materials.
It provides complete sealing due to the connection of its parts using hot welding.
For installation of pipes use special fasteners. Installed system looks aesthetically pleasing and does not make much noise during operation.
The scope of application of sewerage is extensive; it can be installed on any roof. It will be most profitable to purchase for large areas or roofs where it is impossible to use another system.
Photo: Geberit diagram Storm drainage in a private house is a necessary system that is installed immediately after completion of construction work associated with the house. Its different types of water intake and drainage allow you to choose the best option.
Modern types of sewers suggest draining rainwater to large areas or areas where high level daily precipitation. The stormwater system is easy to install and simple to maintain.
A wise person learns not only from own experience, but also on someone else's. Features of the acquisition life experience explained the Russian poet A.S. Pushkin and the English writer Oscar Wilde. According to the first: “...experience, the son of difficult mistakes...”. Oscar Wilde confirmed that “...experience is the name we give to our past mistakes...”. Talking about the experience of working with Geberit products, I would like to note that experience is formed not only from mistakes, but also from successes.
Stormwater systems Geberit is widely used in the construction of large warehouse complexes offering a full range of warehousing services. It is not uncommon for warehouse facilities to be up to half a kilometer long and with a total area of 500 thousand m2. For such objects, the most economical option is to use flat roofs. Organizing drainage from such roofs becomes a complex and responsible engineering task, and often the laying of gravity storm sewer pipelines is an impossible or expensive solution. In these conditions good option is the use of Geberit Pluvia siphon-vacuum water drainage systems.
The operating principle and high throughput of this drainage system allow it to be used in a wide variety of applications: flat roofs, domed and arched roofs of various curvatures, inversion and green roofs - both with extensive and intensive landscaping. Geberit Pluvia is used particularly effectively in projects such as factories, warehouses, shopping centers, airports, hotels, sports centers, etc.
The advantages of the Geberit Pluvia siphon system compared to a traditional gravity system are the following: reduction in the number of funnels, risers and pipelines; reducing the diameter of pipes and the construction volume of the system; lack of slope of horizontal pipelines, which on large roofs can reach several meters; lack of pipelines at the base of the building; reducing the number of releases to external networks; high self-cleaning ability of the system; optimization of external networks by transferring outputs to one side; possibility of preliminary production of system components.
The Geberit Pluvia siphon system consists of specially designed storm drains, piping and a fastening system. The funnels of the siphon system ensure effective collection of water from the roof, preventing air from entering the system. The Geberit Pluvia fastening system facilitates the assembly and installation of pipelines and prevents pipe deformation from temperature and dynamic influences. All funnels can be equipped heating element for protection against freezing during the transition season (spring and autumn). The unique design of Geberit Pluvia roof outlets provides flexibility in possible design solutions and speeds up installation.
To calculate siphon storm drainage systems, Geberit has created its own calculation methods and computer program Geberit Proplaner. Hydraulic calculation of a siphon storm drain system is aimed at determining the diameters of pipelines that provide the closest correspondence between the available pressure and pressure losses (local and linear) in individual sections.
Geberit specialists systematically monitor and systematize their experience in the design, construction and operation of Pluvia siphon storm drainage systems. As a result of this work, the most typical mistakes and their reasons. Here is a short list of individual errors and groups of erroneous actions.
Mistake #1
This is an element selection error. For example, the configuration of the funnels does not correspond to the type of roofing material and roof structure. Sometimes changes are made to the design of the storm drainage system. This often happens because all the features of the project were not taken into account during the design. As a result, installers are forced to order additional “correct” components. Installers sometimes try to install non-standard components on funnels themselves. Sometimes they try to find solutions directly construction site, using improvised means and a large amount of sealant and with unpredictable results.
Mistake #2
There may be a mistake in choosing the fastening of pipelines for a storm drainage system: it happens that this choice is made without taking into account the features of building structures. Thus, the absence of the necessary fixed supports can lead to increased vibrations of pipes and their swinging. In the absence of expansion joints on vertical risers (with the so-called “rigid installation”), large forces arise in the pipeline due to temperature changes; it is necessary to install pipe clamps on studs of large diameters - from 1/2″ to 2″. Clamps and studs of this size are extremely difficult to find on sale. In addition, the force in the places where such supports are attached is quite significant. And not all building construction can perceive them. Absence or incorrect installation supports can also cause deformation of pipelines.
Mistake #3
It consists of combining in one system roof funnels installed on roof areas with a height difference of more than 4 m. This may occur due to attempts to simplify the system and reduce its cost. The hydraulic conditions inside the siphon system can result in water pouring out through funnels on the lower sections of the roof.
Mistake #4
Connecting roof sections with a total area of more than 5000 m2 to one riser. This is due to attempts to simplify the system. This limitation makes it possible to reduce the diameters of pipelines and simplify their installation and operation.
Mistake #5
Errors in determining the estimated flow of rainwater. The reasons for this kind of erroneous actions are different: inaccuracies in calculating the catchment area on complex roofs, choosing the wrong rain intensity, etc. As a result, unstable operation of the system is possible (if the calculated flow rate is exaggerated) or flooding of the roof (if the flow rate is underestimated). An emergency overflow system can compensate for design errors associated with underestimating water flow.
Mistake #6
Installation errors are very critical. These include incorrect installation of funnel elements, deviations from the design pipe diameters, changes in routing, errors in sealing joints with roofing material, defects in welds, etc.
All of the above-mentioned disadvantages of working with storm drainage systems are based on different reasons. Therefore, measures to combat them are different. The same reliable way to avoid possible shortcomings is to strictly comply with the requirements of the current building regulations and installation instructions as well as the “Geberit Pluvia Design Guidelines”.
