Watts F275824 Valve 318973-401 If your diagnostic code indicates

If your diagnostic code indicates a pressure switch failure or "stuck open" error

Versatile fuel compatibility allows use with Natural

Maintenance-Free Design: Aerated non-linting characteristics prevent debris buildup

and Janitrol split systems

or if you observe visible pitting/burning on the contact points

Watts F275824 Valve 318973-401 If your diagnostic code indicatesThe Watts 174A 1 1 4 50 (F275824) is a high capacity ASME Section IV hot water safety relief valve designed specifically for large scale boiler applications and commercial hydronic heating systems. With a standard 1 1 4 inch NPT inlet and outlet, this bronze bodied valve provides a massive relief capacity of 2,459,000 BTU hr at a set pressure of 50 PSI. It features a non metallic heat resistant disc to metal seating surface for reliable shutoff and an