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WaStop® Access

WaStop Access is a complete solution with WaStop detachable in a chamber for easy operation and maintenance. The solution immediately protects people and properties from flooding and backflow, odor and pests in the stormwater and sewer systems. 

WaStop® Access
Technical specifications

WaStop Access is a complete solution in which WaStop is installed. WaStop is a membrane check valve that is normally closed. WaStop comprises two main components: a conical membrane and a valve unit. The solution is extremely adaptable as regards installation options. Common installations: 

  • inlets and outlets
  • existing pipes

The solution of an access chamber is available standard in NPS 4"- NPS 6" in a NPS 17" chamber and Large in NPS 4" - NPS 12" adjacent. There is also a chamber with descent option: "Access Chamber Large" NPS 40" with NPS 8"- NPS 12" adjacent. We also customize solutions. 

Please feel free to contact us, and we will help you find the right solution based on your requirements. 

Download technical specification
Drawings and technical specifications

We at Wapro believe in opportunities. By being an open organization, we can learn from our customers and share our experiences. Below you will find all the information about our products and also other useful and interesting information. Contact us if you are missing something.

Nominal Pipe Size
165.30 lb
Max flow (velocity)
6.60 fps
Max flow (volumetric)
301.20 gpm
39.40 in
Chamber Diameter
39.40 in
Invert-Ground min.
49.20 in
Construction length
50.70 in
Sealed for one-sided pressure

Kerry Olsson

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Kerry Olsson
Sales Manager

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