Lochinvar & A.O. Smith 100110739 Valve 318423-701 The factory setting is 4"

The factory setting is 4" WC

This HVAC pressure switch is factory-calibrated but versatile

This unit is the valve body only

and Tecumseh models AG122RT-003-J7 and AG122UF-104-J7

Lochinvar & A.O. Smith 100110739 Valve 318423-701 The factory setting is 4"The Lochinvar & A. O. Smith 100110739 is an OEM spec 1 inch T&P relief valve engineered for high output commercial and residential water heating systems. Designed to trigger at a 150 PSI pressure setting or a thermal limit of 210F, this valve provides critical over pressure and over temperature protection to prevent catastrophic tank failure. It features a 1" MNPT inlet and 1" FNPT outlet, ensuring a high capacity discharge flow rated at 500,000 BTU