Non Return Valve DN100/4

Retrofit Non-Return Valves

Unobtrusive to natural flow
• A proven flood prevention method
• Helps to protect homes, properties, commercial
buildings, roads etc
• Also suitable as rodent deterrents with rat block
features
• Maintenance free
• Fit into existing manhole in minutes
• WRc Approved™

Fernco’s Non-return valves allow sewer or surface water materials to freely flow in the
direction of the systems mains but block backflow of those materials in the opposite
direction in instances, such as, flooding.

Fernco’s range of retrofit Non-Return Valves (NRV’s) can be
installed directly into existing manholes by simply pushing the
NRV into the desired pipe inlet. The product prevents foul water
flowing back from the blocked sewerage systems to flood the
property from the inside via toilets, plug holes and waste pipes.
The Retrofit NRV’s can be fitted in minutes and do not require
any specialist expertise or equipment.
Users also benefit from protection against rodent infestation. The
stainless steel reinforced flap helps to block rats and other
rodents and insects from traveling up pipes and into homes and
commercial buildings.