Backflow flaps with innovative Stop-Silent® technology: always in flow

Are you a property owner and would like to know what the proven Stop Silent® technology is all about? And how the Stop Silent® SL13 backwater valve can prove useful for you in wastewater applications?

As a specialist in innovative backwater valves, we will explain to you what Stop-Silent® and Stop-Silent® SL13 technology is all about. You need the dampers specially designed for pipes and ducts in connection with the building services of your property. This innovative technology is available exclusively from us.
We offer you the Stop Silent® non-return valve for clean water pipes and the Stop Silent® SL13 non-return valve for wastewater applications.
Here you can also find out about the advantages of Stop Silent® and Stop Silent® SL13 technology from Lasso Technik AG.

What is the specific function of the non-return valve and the backflow flap?

The Stop-Silent® non-return valve ensures that the water in pipes and lines can always flow in one direction without being able to reverse. This applies in particular to drinking water pipes, but also to service water pipes - e.g. for heating water. The valves are also used in conjunction with fittings or pumps to determine the direction of flow. The flaps are always closed unless they open when the liquid is flowing in the right direction. In this way, it is possible to prevent water backflow in pumps.
The Stop-Silent® SL13 backflow flap is used in wastewater pipes. Designed for backwater, the flap has proven its worth, for example, when the sewer system threatens to flood. If too much water enters the sewer system - e.g. due to heavy rain - the water level rises. As soon as the backwater level is exceeded, there is a risk of flooding apartments in the basement or cellar. This can result in the costly removal of faecal water damage.

Where is the backflow flap installed?

It is installed in the inspection chamber and can be easily installed in just a few minutes. Furthermore, no conversions are required. A major advantage of the backwater flaps is that they can be used without electricity and are always active, i.e. autonomous. The backwater flap simply clamps into the wastewater pipe. This means that no structural measures or special precautions are required for installation. Thanks to our easy-to-understand installation instructions, the backwater flaps can be installed and retrofitted by yourself, even without specialist knowledge.

What is special about the Stop-Silent® SL13 technology?

Backflow flaps equipped with this innovative technology have membranes. As soon as the liquid hits the flap, it deforms slightly so that the liquid can flow through. If strong pressure is exerted on the flap in the other direction of flow, it closes completely and offers very high resistance. The flap thus ensures a reliable and precise seal. This prevents flooding.

How often should the backwater flap & non-return valve be maintained?

The manufacturer recommends servicing the flap once a year if it is used for rainwater. If you use the flap in conjunction with wastewater (e.g. faeces), maintenance is recommended twice a year. The first step is to check that it is working properly.
In addition, the functionality of the valve should be checked and whether the pipe behind it is working properly. If cleaning is necessary, it is important to carry it out very gently and never under high pressure. For example, you can simply remove the valve from the pipe, clean it by hand and simply reinsert it into the pipe.

Lasso technology - quality from the experts

With the backwater flaps and non-return valves from Lasso Technik AG, you are relying on a company that has been producing reliable and established solutions in the field of flow and building technology since 1942.
The backflow flaps and non-return valves from Lasso Technik AG are characterized by a long service life and are a long-term investment at low cost.

Choose quality now!