We suggest a hierarchical approach to choosing your mains NRVS.

  • Always fit a dual flap NRV if space exists for a new manhole between the existing manhole and the house
  • If there is no space for a manhole but a Duck Bill NRV will fit choose this option next
  • Next choice is a push fit NRV into your existing manhole
  • If all else fails then you will have to resort to a PANSEAL that fits into your WC when needed

REDI-Non Return Valve

FEATURES:

  • Mains sewage backflow prevention valve
  • Dual flaps for added security
  • Fits in-line with sewage pipe in new manhole
  • Automatic operation with manual lock if required

Push-Fit Non-Return Valve

FEATURES:

  • Mains sewage backflow prevention valve
  • Fits into existing manhole
  • DIY solution
  • Single flap valve can be manually locked shut

Duckbill Non-Return Valve

Features:

  • Mains sewage backflow prevention valve
  • Fits in-line with sewage pipe but new manhole not required

Appliance Non-Return Valve

Features:

  • Backflow protection for washing machines and dishwashers
  • Fitted internally (preferable) or externally
  • Must be installed horizontally