Non Return Valve 100mm (4")

Fernco Non-Return Valve DN100 (4") is a retrofit push-fit solution that installs directly into existing manholes to prevent backflow from blocked or surcharging sewers. The unobtrusive design allows wastewater to exit normally while stopping reverse flow that can force foul water up through toilets and wastes. Fitting takes minutes with no specialist tools, and the stainless-steel reinforced flap also serves as a rodent deterrent. Available in sizes to suit DN100 and DN150, with WRc approval on NRV100, it’s a fast, low-maintenance upgrade for flood resilience and pest control.

Benefits

• Simple push-fit installation into existing manhole
• Unobtrusive when installed
• Two sizes available to suit DN100 and DN150 pipes
• Universal for all pipe materials within the product’s size range
• Protects against back flow and pests, such as rats and other rodents
• Stainless steel reinforced flap for added protection against rodent infestation
• NRV100 WRc Approved