Fernco Retrofit 4” Non Return Valve

Protect your property from flooding, water damage, and rodent infestations with Fernco's 100mm Retrofit Non-Return Valve (NRV). Designed to prevent backflow in your sewer and surface water systems, this high-quality, maintenance-free valve ensures that foul water stays where it belongs, even in the event of blockages or heavy flooding. Whether for a domestic home, commercial building, or infrastructure, Fernco’s 100mm NRV provides a fast, effective solution to safeguard your property.

For larger applications, a 150mm option is also available here.

Why Choose Fernco’s 100mm Retrofit Non-Return Valve?

• Effortless Installation
  The retrofit design means no major alterations to your existing system. Simply push the 100mm NRV into the desired pipe inlet within your manhole – no specialist tools or expertise required. It takes just minutes to install, offering immediate protection.
  
  
• Flood Prevention
  The 100mm NRV prevents foul water from flowing back into your property, protecting your home or business from internal flooding via toilets, plug holes, and waste pipes. Say goodbye to the risk of water damage during heavy rainfall or sewer blockages.
  
  
• Rodent and Pest Deterrent
  The stainless steel reinforced flap of the 100mm NRV not only prevents backflow but also blocks rats, rodents, and insects from entering your property through the drainage system. A two-in-one solution for both water damage and vermin protection.
  
  
• Maintenance-Free
  Once installed, Fernco’s 100mm NRV requires no upkeep, saving you time and money while providing long-term peace of mind. It’s a reliable, set-and-forget solution.
  
  
• Unobtrusive Design
  Designed to blend seamlessly into your drainage system, the 100mm NRV operates quietly and efficiently without disrupting the natural flow of water.
  
  
• WRc Approved™
  Fernco’s 100mm NRV is certified by the Water Research Centre, ensuring it meets the highest standards for quality and performance.

What is a Non-Return Valve (NRV)?

A Non-Return Valve (NRV) is an essential component in drainage systems. It allows water to flow freely in one direction but automatically closes when there’s backflow, such as during a flood or sewer blockage. This prevents foul water from entering your property through toilets, sinks, and waste pipes, keeping your home or business safe and dry.

The Retrofit Advantage

Fernco’s 100mm Retrofit Non-Return Valve offers the significant benefit of being quick and easy to install into your existing drainage system. Unlike a full system overhaul, the NRV can be added to your current setup without the need for specialist equipment or complicated procedures. It’s an ideal, cost-effective solution for homeowners and businesses looking to protect their properties from water damage and rodent infestations without the hassle or expense of major installation work.

Trusted by Experts

Formerly known as Flexseal, Fernco is a leader in the drainage marketplace, providing high-quality solutions for drainage, water management, and flood prevention. With Fernco's 100mm Retrofit Non-Return Valve, you can trust that your property will be protected from backflow and the risks of water damage and pests.

Fernco’s Retrofit Non-Return Valve is WRc Approved™ and complies with the BS EN 13564-1:2002 standard. This ensures it meets rigorous quality and performance requirements, providing you with a reliable solution that adheres to industry-leading specifications for drainage and flood prevention systems.

Keep your property dry, secure, and free from rodent threats with Fernco's 100mm Retrofit Non-Return Valve – the quick, effective, and reliable solution for flood and vermin protection.