Adding this Non-Return Valve to your DN100 pipes can help protect your property from flooding and water damage, while contributing to an efficient and well-functioning plumbing system. This valve is designed specifically for DN100 pipes, ensuring a perfect fit to keep the valve in place and working properly. Specially made out of flexible polymeric material, this non-return valve forms a reliable watertight seal despite any minor misalignments in the pipe or any movement in the pipes due to temperature changes. The one-way flap mechanism design reduces the need for maintenance and helps prevent backflow into your pipes. Designed with both durability and functionality in mind, this valve ensures that you get two attractive features at once. It is also resistant to abuse from toxic fluids and gases, so even after long-term use it will remain reliable\u2014ensuring you won't find yourself dripping halfway through a project!