WaStop 230 Stainless steel

WaStop® Inline Check Valve

Basement flooding
High Water Levels
Odor control
Protection from Animal Infestation
Pump stations
Surface water flooding
Tidal Water

WaStop inline check valves have been an industry leader since their inception in 2000.  Developed on the same principles that are the foundation of Wapro, WaStop’s ingenious function combines common sense and simplicity, to provide our customers with the best possible protection against flooding, odour control and backflow. 

  • Lowest headloss amongst inline check valves
  • Easy installation saving costs on contraction & installation
  • In-built automatic pulsating flow mechanism
WaStop 230 Stainless steel

We at Wapro know that any solution for flood prevention, or odor control needs to function. Simply, effectively. That’s why, when we invented the WaStop inline check valve in 2000 we had one thought in mind. Instant automatic protection. Working on differential pressure the WaStop functions autonomously, without human interaction, without electricity, without constant maintenance.

It just works.

To invent the best inline check valve on the market our engineers went one step further. We also thought about the different parts of the process and who would be affected by the design of the valve. With function top of mind our engineers developed a valve that works in stormwater, sewer, odor applications, as well as ensuring to cover the range of sizes of existing pipes to enable retro-fitting with ease.

We currently cover all sizes of pipes, all shapes and sizes, from 3-72". As standard. Off the shelf in most cases, for fast delivery. We keep stock to ensure the contractor and end user can keep time and costs to a minimum. We have a standard set of sizes which can be customized, quickly, to suit any application. Flanges on inlet, outlet or somewhere in between are all easily available. Quickly. Long life-cycle is part of our DNA. It’s part of our values. With this in mind we use the right materials for the right application. Stainless steel AISI 304 (EN1.4301) and AISI 316L (EN1.4404), along with a membrane material suited to the application.

The properties of the Memory Membrane:

  • Low opening pressure
  • Extremely low headloss
  • High resistance to external factors (temperature, chemicals, debris, abrasives)
  • Best possible seal against backflow in both high and low pressure events
  • Exceptional mechanical memory ensuring longevity
  • In-built, automatic, pulsating flow action

We at Wapro know that there is a wide range of pipes available on the market, and that these pipes aren’t always perfect.

To ensure the valve we provide you with fits perfectly and protects 100% we’re engineered the guess work out of it. Keeping in line with our customer promise of common sense and simplicity, we have developed a standard range of WaStop from 3-72". On top of this we have a Superior Fit Seal to ensure there is no leakage between the existing pipe and the WaStop Inline Check Valve.

We designed this seal to not only create the perfect fit, but also to ensure quick easy installation. Time is money.

For the residential market we have designed a range of valves for protecting memories. Protecting basements filled with photographs, toys, electronics or books can be easily done with a PVC/PE WaStop Inline Check Valve.   Click here to read more about these valves.  

Dimensions

Article number Nominal pipe size NPS [inch] Length [in] Outer Diameter [inch] Opening pressure Standard Imperial [inH2O] Closing pressure Standard Imperial [inH2O] Shop Drawing (PDF) Shop Drawing (DWG) Technical Specification
ws97 4 8,27 3,82 7,5 2,7 PDF PDF pdf
ws97-sh 4 6,3 3,82 7,5 2,7 PDF PDF pdf
ws101 4 8,46 3,94 8 2,6 PDF PDF pdf
ws101-sh 4 6,5 3,94 8 2,6 PDF PDF pdf
ws116 5 8,46 4,53 10,4 3,3 PDF PDF pdf
ws116-sh 5 6,5 4,53 10,4 3,3 PDF PDF pdf
ws146 6 6,3 5,69 8,9 3 PDF PDF pdf
ws146-sh 6 4,72 5,69 8,9 3 PDF PDF pdf
ws183 8 15,16 5,69 10,5 4,6 PDF PDF pdf
ws183-sh 8 10,63 7,13 10,5 4,6 PDF PDF pdf
ws193 8 15,55 7,52 8,7 4,3 PDF PDF pdf
ws193-sh 8 10,83 7,52 8,7 4,3 PDF PDF pdf
ws215 9 17,72 8,46 9 5,4 PDF PDF pdf
ws215-sh 9 11,81 8,46 9 5,4 PDF PDF pdf
ws230 10 18,9 9,06 8,4 5 PDF PDF pdf
ws230-sh 10 12,6 9,06 8,4 5 PDF PDF pdf
ws240 10 20,47 9,45 7,5 4,5 PDF PDF pdf
ws240-sh 10 13,78 9,45 7,5 4,5 PDF PDF pdf
ws283 12 23,62 11,14 8,2 4,2 PDF PDF pdf
ws283-sh 12 15,75 11,14 8,2 4,2 PDF PDF pdf
ws290 12 23,62 11,42 8,5 6 PDF PDF pdf
ws290-sh 12 15,75 11,42 8,5 6 PDF PDF pdf
ws340 14 27,56 13,39 13,2 8 PDF PDF pdf
ws340-sh 14 19,69 13,39 13,2 8 PDF PDF pdf
ws370 15 28,74 14,57 8,6 5,9 PDF PDF pdf
ws370-sh 15 19,69 14,57 8,6 5,9 PDF PDF pdf
ws390 16 29,53 15,35 12,8 8,4 PDF PDF pdf
ws390-sh 16 19,69 15,35 12,8 8,4 PDF PDF pdf
ws440 18 33,07 17,44 8,1 5,4 PDF PDF pdf
ws440-sh 18 22,05 17,44 8,1 5,4 PDF PDF pdf
ws490 20 35,43 19,29 9,2 6 PDF PDF pdf
ws490-sh 20 23,62 19,29 9,2 6 PDF PDF pdf
ws590 24 47,24 23,11 14 9,7 PDF PDF pdf
ws690 28 51,18 27,17 10,4 6,4 PDF PDF pdf
ws750 30 55,12 29,53 14,7 9,4 PDF PDF pdf
ws790 32 59,06 31,1 13,3 8,7 PDF PDF pdf
ws885 36 66,93 34,84 15,8 10,6 PDF PDF pdf
ws985 40 70,87 38,78 15,8 10,3 PDF PDF pdf
ws1040 42 78,74 40,94 22,8 14,2 PDF PDF pdf
ws1185 48 88,58 46,65 18,2 11,4 PDF PDF pdf
ws1385 56 102,36 54,53 21,2 13,6 PDF PDF pdf
ws1485 60 110,24 58,46 26,7 16,5 PDF PDF pdf
ws1585 64 118,11 62,4 23,5 15,1 PDF PDF pdf
ws1785 72 122,05 70,28 25,8 16,5 PDF PDF pdf
ws250pe 10 18,9 9,84 8,5 5,4 PDF PDF pdf
ws250pe-i 10 18,9 9,29 8,5 5,5 PDF PDF pdf
ws315pe 12 23,62 12,4 8,5 6,3 PDF PDF pdf
ws315pe-i 12 23,62 11,61 8,9 6,4 PDF PDF pdf

Keeping common sense and simplicity as keywords throughout development, Wapro is able to provide a solution which can be installed in minutes in a wide range of pipes, with or without flanges, and at any angle. 

Wapro’s focus on simple innovative solutions has led to the development of our unique Memory Membrane.  Designed with the user in mind, this membrane ensures longevity.  We at Wapro understand that maintenance budgets are being cut back.  In tune with our customers’ needs, WaStop’s unique pulsating flow ensures that maintenance is kept to a minimum.  We also know that real life means our valves are put to the test daily with chemicals, temperature changes, debris and unforeseen events.  Our engineers work constantly with real life testing of existing and new materials to ensure our valves withstand real life environments.

We also understand that the ‘throwaway culture’ is being heavily criticized.  The value of ‘life-cycle cost’ over ‘cheapest possible purchase price’ has gained ground with a realization that during storm conditions, the function of the assets in the stormwater or sewer system is by far more important than the initial purchase price of the products in the system. 

In order to protect against flooding, we at Wapro have engineered the WaStop to ensure the lowest possible opening pressure whilst maintaining the best possible seal against backflow.  This, combined with the lowest headloss available, gives the most efficient flow conditions, ensuring the fastest evacuation of water.  An essential quality of check valves used to protect people and property.

Put WaStop to the test in your system to experience the Wapro difference.

We at Wapro believe in enabling. By being an open organization we learn from, and share with, our customers. Below you’ll find that there is a wealth of information in relation to not only our products, but also other useful and interesting information to help you in your role. If you require any further information please don't hesitate call us. We’re here to help you stop flooding.

Technical Documentation

Technical drawings and specifications can be downloaded for each dimension under the tab for Dimensions and Technical Drawings.  Below you'll find information relating to WaStop such as installation instructions and White Papers.  Please contact us if you require any other information.

Certifications and Approvals

A rigorous testing procedure is undertaken at Wapro to ensure our valves meet our exacting standards.  Our valves tested to appropriate standards in our target markets at third party organizations such as Utah State University Hydraulics Lab and with Kiwa on an annual basis.  

CE-approved models (NPS 3-8") are tested according to SS-EN-13564. Other dimensions are tested according to the same standard. WaStop is patented in the EU, USA and other countries.

WaStop is extremely adaptable in regards to installation options. It can be installed from horizontal to vertical and in both cases can be installed for use in both directions. Joint connections are available for purchase upon request.

Common installations include:

  • Inlets and outlets
  • Installation in an existing pipe
  • Pump stations
  • In manholes and chambers

A rigorous testing procedure is undertaken at Wapro to ensure our valves meet our exacting standards. Our valves tested to appropriate standards in our target markets at third party organizations such as Utah State University Hydraulics Lab, Danish Technological Institute.  Kiwa Sverige AB on an annual basis.

CE-approved models type 0 (NPS 3-8") are tested according to SS-EN 13564-2:2002.
WaStop also meets the requirements according SS-EN 13564-1:2002 and quality assurance according SS-EN 13564-3:2004. Other dimensions are tested according to the same standard and meets the same requirements and quality assurance.

WaStop is patented in the EU, USA and other countries.

Product information

We at Wapro know that any solution for flood prevention, or odor control needs to function. Simply, effectively. That’s why, when we invented the WaStop inline check valve in 2000 we had one thought in mind. Instant automatic protection. Working on differential pressure the WaStop functions autonomously, without human interaction, without electricity, without constant maintenance – it just works.

WaStop is available to fit most types of pipes from DN75 to DN1800 and is also available in an Access chamber for easy access from ground level.

WaStop inline check valve excels in many areas. WaStop exhibits the lowest headloss on the market, 100% backflow prevention and a unique pulsating flow that keeps pipes both upstream and downstream cleaner which reduces maintenance costs substantially.

Click below to read more about Headloss, Backflow, Pulsating Flow and Installation.

Read more

WaStop inline check valve excels in many areas such as having the lowest headloss on the market, 100% backflow prevention and a unique pulsating flow that keeps pipes both upstream and downstream cleaner which reduces maintenance costs substantially.

Please click on the links below to understand how each of the features of WaStop can be an advantage for your stormwater or sewer network.

Technical Information

We at Wapro know that there is a wide range of pipes available on the market, and that these pipes aren’t always perfect. We designed this seal to not only create the perfect fit, but also to ensure quick easy installation. Time is money.

For the residential market we have designed a range of valves for protecting memories. Please refer to the WaStop Residential pages for more information.

WaStop is also available in an Access Chamber. The Access chamber has a pre-installed WaStop valve. The WaStop module is removable from ground level for easy maintenance. Available in DN110, DN125 and DN160mm. Please refer to drawings for more information.

The following technical information relating to WaStop can be found on the tabs below.

  • Drawings
  • Technical Specifications
  • Installation Instructions
  • Certifications
Dimensions & Drawings
Installation
Documents

To ensure the valve we provide you with fits perfectly and protects 100% we’re engineered the guess work out of it. Keeping in line with our customer promise of common sense and simplicity, we have developed a standard range of WaStop from 75mm - 1800mm. On top of this we have a Superior Fit Seal to ensure there is no leakage between the existing pipe and the WaStop Inline Check Valve.

Dimensions

Article number Nominal pipe size NPS [inch] Length [in] Outer Diameter [inch] Opening pressure Standard Imperial [inH2O] Closing pressure Standard Imperial [inH2O] Shop Drawing (PDF) Shop Drawing (DWG) Technical Specification
ws97 4 8,27 3,82 7,5 2,7 PDF PDF pdf
ws97-sh 4 6,3 3,82 7,5 2,7 PDF PDF pdf
ws101 4 8,46 3,94 8 2,6 PDF PDF pdf
ws101-sh 4 6,5 3,94 8 2,6 PDF PDF pdf
ws116 5 8,46 4,53 10,4 3,3 PDF PDF pdf
ws116-sh 5 6,5 4,53 10,4 3,3 PDF PDF pdf
ws146 6 6,3 5,69 8,9 3 PDF PDF pdf
ws146-sh 6 4,72 5,69 8,9 3 PDF PDF pdf
ws183 8 15,16 5,69 10,5 4,6 PDF PDF pdf
ws183-sh 8 10,63 7,13 10,5 4,6 PDF PDF pdf
ws193 8 15,55 7,52 8,7 4,3 PDF PDF pdf
ws193-sh 8 10,83 7,52 8,7 4,3 PDF PDF pdf
ws215 9 17,72 8,46 9 5,4 PDF PDF pdf
ws215-sh 9 11,81 8,46 9 5,4 PDF PDF pdf
ws230 10 18,9 9,06 8,4 5 PDF PDF pdf
ws230-sh 10 12,6 9,06 8,4 5 PDF PDF pdf
ws240 10 20,47 9,45 7,5 4,5 PDF PDF pdf
ws240-sh 10 13,78 9,45 7,5 4,5 PDF PDF pdf
ws283 12 23,62 11,14 8,2 4,2 PDF PDF pdf
ws283-sh 12 15,75 11,14 8,2 4,2 PDF PDF pdf
ws290 12 23,62 11,42 8,5 6 PDF PDF pdf
ws290-sh 12 15,75 11,42 8,5 6 PDF PDF pdf
ws340 14 27,56 13,39 13,2 8 PDF PDF pdf
ws340-sh 14 19,69 13,39 13,2 8 PDF PDF pdf
ws370 15 28,74 14,57 8,6 5,9 PDF PDF pdf
ws370-sh 15 19,69 14,57 8,6 5,9 PDF PDF pdf
ws390 16 29,53 15,35 12,8 8,4 PDF PDF pdf
ws390-sh 16 19,69 15,35 12,8 8,4 PDF PDF pdf
ws440 18 33,07 17,44 8,1 5,4 PDF PDF pdf
ws440-sh 18 22,05 17,44 8,1 5,4 PDF PDF pdf
ws490 20 35,43 19,29 9,2 6 PDF PDF pdf
ws490-sh 20 23,62 19,29 9,2 6 PDF PDF pdf
ws590 24 47,24 23,11 14 9,7 PDF PDF pdf
ws690 28 51,18 27,17 10,4 6,4 PDF PDF pdf
ws750 30 55,12 29,53 14,7 9,4 PDF PDF pdf
ws790 32 59,06 31,1 13,3 8,7 PDF PDF pdf
ws885 36 66,93 34,84 15,8 10,6 PDF PDF pdf
ws985 40 70,87 38,78 15,8 10,3 PDF PDF pdf
ws1040 42 78,74 40,94 22,8 14,2 PDF PDF pdf
ws1185 48 88,58 46,65 18,2 11,4 PDF PDF pdf
ws1385 56 102,36 54,53 21,2 13,6 PDF PDF pdf
ws1485 60 110,24 58,46 26,7 16,5 PDF PDF pdf
ws1585 64 118,11 62,4 23,5 15,1 PDF PDF pdf
ws1785 72 122,05 70,28 25,8 16,5 PDF PDF pdf
ws250pe 10 18,9 9,84 8,5 5,4 PDF PDF pdf
ws250pe-i 10 18,9 9,29 8,5 5,5 PDF PDF pdf
ws315pe 12 23,62 12,4 8,5 6,3 PDF PDF pdf
ws315pe-i 12 23,62 11,61 8,9 6,4 PDF PDF pdf

WaStop is extremely adaptable in regards to installation options. It can be installed from horizontal to vertical and in both cases can be installed for use in both directions. Joint connections are available for purchase upon request.

Common installations include
• Inlets and outlets
• Installation in an existing pipe
• Pump stations
• In manholes and chambers

We at Wapro believe in enabling. By being an open organization we learn from, and share with, our customers. Below you’ll find that there is a wealth of information in relation to not only our products, but also other useful and interesting information to help you in your role. If you require any further information please don't hesitate call us. We’re here to help you stop flooding

Technical Documentation

Technical drawings and specifications can be downloaded for each dimension under the tab for Dimensions. Please contact us if you require any additional information.

Approvals and Certifications

A rigorous testing procedure is undertaken at Wapro to ensure our valves meet our exacting standards. Our valves tested to appropriate standards in our target markets at third party organizations such as Utah State University Hydraulics Lab, Danish Technological Institute.  Kiwa Sverige AB on an annual basis.

CE-approved models type 0 (DN80-200mm) are tested according to SS-EN 13564-2:2002.

WaStop also meets the requirements according SS-EN 13564-1:2002 and quality assurance according SS-EN 13564-3:2004. Other dimensions are tested according to the same standard and meets the same requirements and quality assurance.

WaStop is patented in the EU, USA and other countries.

Tests

Read more about our tests of this product.

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