The smart backwater protection for up to DN2000

MwStop^® Check Valve

The MwStop® check valve can be easily installed in any standard pipe size. Retrofitting into existing networks is simple and can be done at any time. MwStop® check valves are tested to withstand a water column of at least 5 m (3 m for the “Soft” version).

Areas of application

Main collectors
Wastewater pipes
Stormwater pipes
Treatment tanks

Backwater protection

Reliable protection for your building from high water levels, flooding and overflow. The integrated membrane reliably closes the pipe leading to the property e.g. during heavy weather events or failure of the pumping station. Your building is protected.

Easy Installation

Fits any standard pipe size. Retrofitting in existing networks is possible at any given time in the simplest way. The MwStop^®backwater valve is the ideal choice for new construction projects as well as existing buildings.

Odour control

A big surplus: The MwStop^®blocks out odours from the sewage system efficiently. The innovative membrane also closes the pipe passively, thus protecting against unpleasant odours and pest/animal infestation from the sewer system.

The smart backwater protection for up to DN2000

MwStop^® Check Valve

The MwStop® check valve can be easily installed in any standard pipe size. Retrofitting into existing networks is simple and can be done at any time. MwStop® check valves are tested to withstand a water column of at least 5 m (3 m for the “Soft” version).

Areas of application

Main collectors
Wastewater pipes
Stormwater pipes
Treatment tanks

FIELD OF APPLICATION

MwStop® check valves effectively protect against backwater, flooding and additionally against odour nuisance.

Main collector
Sewer pipes
Storm water pipes
Clarification basins

DIMENSIONS UP TO DN2000

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FUNCTIONING of the MwStop® check valve

As soon as water flows in the direction of flow through the pipe to be secured, the MwStop® check valve is subjected to increasing pressure. This pushes the diaphragm upwards so that the water can flow freely below the valve. The rising water pressure triggers a controlled surge flushing, which consequently ensures the regular removal of existing sediments. On the other hand, the tight seal reliably prevents unpleasant odours in the pipe network. As soon as water flows against the direction of flow through the pipe to be secured, the MwStop® check valve fills up and consequently effectively prevents the water from backing up. The backwater height varies depending on the MwStop® model (maximum 8,000mm).

One MwStop® – 3 FUNCTIONS

Backflow prevention
Odour control
Surge flushing

One MwStop® – MANY ADVANTAGES

extremely low pressure drop
without moving parts
for all pipe materials and sizes
very simple installation
long service life

LONG SERVICE LIFE

The design, which has been reduced to an optimum, and the use of high quality materials of the MwStop® check valve are designed to convince with a long service life. In addition, the MwStop® check valves are an effective add-on for every object.

INSTALLATION

MwStop® can be installed in practically any pipe, by the way, even retrofitted, in just a few minutes. Therefore, the backwater valve immediately provides effective protection against floods, foreign bodies and annoying odours. The wide range of MwStop® check valves ensures that the right MwStop® model is available for every application. Areas of application include, for example, backwater protection of the sewage system, use in rainwater pipes or, for example, to prevent the formation of odours in combined sewers.

MwStop® valves can be installed in a wide variety of ways in any position. Full functionality is provided from horizontal to vertical.

BACKWATER HEIGHTS

MAXIMUM BACKWATER PROTECTION

The standard MwStop® models provide backflow protection up to a height of 5,000mm water column.
The soft versions of the MwStop® check valve offer backwater protection up to a height of 3,000mm water column.
Special designs up to 8,000mm backflow protection are available on request.

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TYPES

DIFFERENT MwStop® SIZES FOR ALL CURRENT INSIDE PIPE DIAMETERS.

The MwStop® check valves are available as standard up to DN2000 and are thus available for practically all common internal pipe diameters and pipe materials. We are happy to supply special sizes on request!

MwStop® STANDARD

FOR SLOPES ≥2%

In order to ensure the full functionality of the standard version of the MwStop® check valves, a slope of at least 2% is required. In order to be able to open specifically, a certain water pressure is required on the MwStop® diaphragm. This minimum pressure also ensures that controlled surge flushing is triggered when the diaphragm is opened.

MwStop® SOFT

FOR LOW SLOPES

A product version with softer membrane material is used for installation with a gradient of less than 2% (min. 1%). It ensures that the MwStop® opens reliably even in these cases and provides for the safe removal of the wastewater that accumulates, including any deposits.

MwStop® STANDARD

Clamp mounting

MwStop® SHORT

Clamp mounting

MwStop® FLANGE

Flange mounting

MwStop® FLANGE

Flange mounting

MATERIALS

HOUSING

The MwStop® housing is made of EN 1.4404/AISI 316L stainless steel as standard. For sizes up to DN200, for installation as part of a pipe, a PVC/PE variant of the housing can be used as an alternative.

MEMBRANE

The MwStop® diaphragm is manufactured in EPDM up to DN2000. The diaphragm is available in two different versions (standard and soft)

MwStop® check valve – APPLICATIONS

There are numerous causes for backwater in rainwater or sewage pipes. For example, heavy rain or pipe blockages. But both an operational failure in the pumping station and other overloading of the sewage system can become a problem. Another application example is the backwater from water bodies caused by floods. The large quantities of water that suddenly occur can quickly exceed the capacity of the sewage system.

The MwStop® check valve protects against backwater, water ingress and foreign bodies in buildings, sewage and rainwater pipes. In addition, the check valve is an effective protection against odour nuisance from the sewer system.

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BUILDING PROTECTION

Building protection against flooding
Backwater protection
Backwater protection Floor inlets
It is also important to note: The building owner is always responsible for protection against backwater.

FLOOD PROTECTION

Public sewer
Backwater protection
Regulation of waste water
Triggering of surge flushing

ODOUR VALVE

MwStop® is the perfect solution for nuisance caused by odour-intensive substances from the sewage system, for example during longer dry periods or in facilities and buildings that are not used all year round, so that the siphons dry out and unpleasant odours arise.