Flood protection

Case

To prevent backflow in the pumps, a WaStop Check Valve was installed in each pump. In a football stadium, stormwater is rarely free of debris. Mugs, hot dogs, packaging, and other debris eventually end up in the stormwater system. The designers were impressed by the WaStop’s pulsating flow mechanism, which ensures that no debris gets stuck in the valve and keeps the line clear of sediment both upstream and downstream.

In addition to the three valves that protect the pumps, there is a fourth WaStop that prevents floodwater from entering the stadium’s drainage system during high tide. Two more WaStops have been installed in the nearby athletics stadium for the same reason.

Thanks to WaStop’s patented memory membrane and pulsating flow, Baylor University and its fans can relax in the knowledge that the Bears will play no matter what the weather.

Case

To solve the problem, a WaStop DN1200 was installed. WaStop is an obvious solution for this application area as the product is designed to prevent backflow that can occur due to, for example, tides. And thanks to WaStop's high resistance to external factors, the customer can ensure that unauthorized persons do not enter the outlet. We thank the customer for their trust and look forward to the next project.

Case

With the consulting engineering office contacting Wapro’s business partner in Finland, Ulefos Oy to find a solution, a teams meeting was setup with Wapro to discuss possible solutions. In the end, a customized WaStop DN1600 with bell-bolt installation was decided to be the best option for the application. With the bell-bolt option, the contractor could install WaStop above ground in the new DN1600 stainless-steel pipe instead of having to conduct the installation process of the valve at the outfall-site.

The DN1600 stainless steel pipe with the WaStop pre-installed was then lowered in place to connect to the upstream inspection chamber with ease.

The WaStop will ensure an effective evacuation of the stormwater with the lowest head loss amongst inline-check valves on the market and will help protect this beautiful area of Helsinki from flooding in the future.

Case

To effectively address the issue, we installed a special solution Wastop Inline check valve 164ft downstream in a narrow, one-meter-wide chamber. Since the pipeline was constantly submerged, a diver measured the exact inner diameter, as traditional access was impossible. Given the chamber’s tight dimensions, we custom-trimmed the Wastop to be even shorter than the standard short version. Additionally, we integrated the reinforcement ring, normally installed separately, directly into the unit to ensure a perfect fit within the confined space.

The choice of membrane was crucial for this application. We selected the soft S2 membrane, designed to open at just 7 inches of differential pressure. This allowed the valve to function underwater despite backpressure, effectively preventing water from cresting the pumping station’s threshold. By modifying the body, trimming the bottom, and utilizing the uniquely responsive S2 membrane, we provided the only solution on the market capable of operating under these conditions, opening even with backpressure at minimal differential pressure.

For installation, we sealed one end of the pipeline, pumped out the water, and carefully positioned the Wastop. This setup successfully prevented backflow at an early stage, protecting the industrial area while keeping energy costs in check, all despite the complex and restrictive environment.