Karmat Backwater Whew (non-return valves) effectively secure any rooms located in the lower floors against flooding caused by backflow of stormwater and sewage. Backflow may be caused by intense rains, thaw, or floods. Use of anti-flooding devices for rooms located on the lower floors is required by obligatory building code regulations.
- Made of a durable and high quality polypropylene
- Resistant to corrosion, negative temperatures and chemicals
- Simple and effective closure mechanism
- Easy to install
- Self operating without the need of external power
- Effective rodent protection
- Inhibits unpleasant smells from reentering
- Maximum operating temperature 95°C
- Maximum operating pressure 0.5 bar