Questions? 916-760-4524


The 40/50 Relief Valve Rubber Kit Deringer & Magnum 40/50 Relief Valve. The Deringer & Magnum Relief Valve is the smallest and the lightest relief valve assembly in the industry.

The Relief Valve Ruber Kit includes:
  • Stainless Steel Relief Valve Piston
  • Relief Valve Adapter O-Ring
  • Relief Valve Flange O-Ring
  • Relief Valve Diaphragm
  • Guide Pin Retainer Ring

Note: This relief valve rubber kit fits all relief valve sizes (2" - 8")

24-hour ShippingShips in 24 hours!



Pro Price:

Write a review about this product ▶

Relief  Valve

The Deringer 40/50 Relief Valve uses a stainless steel body, piston seal and stainless steel sensing line and has been designed to be the smallest and lightest Relief Valve in the industry. Unlike previous relief valve designs, the piston seal does not use the body of the relief valve to align itself properly when closing and opening and instead uses the guide pin on the piston. This will aid in making the Relief Valve resistant to build up and binding. All components of the relief valve are lead free and meet the SDWA requirements.

Relief Valve Image



Backflow Direct Product Warranty

Relief Valve  Maintanence

The Relief Valve Maintenance Video provides a step by step procedure for maintaining a Relief Valve for a 2" - 8" Deringer & Magnum 40 & 50 backflow preventer.

View Video Button

Backflow Direct Product Warranty

Product  Warranty

This printable document provides information for the Backflow Direct one year warranty for Deringer and Magnum backflow preventers.

Download pdf button View Video Button

WARNING: Cancer and Reproductive Harm -     Copyright © 2018 BackFlowDirect LLC, All Rights Reserved.