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or the furnace "short cycling" due to inconsistent gas pressure levels that trip safety sensors
Common Questions Can the 620-406 replace a 120V primary transformer
a gauge with a lower range is recommended to prevent bottoming out the needle
it is rated for hot water boilers provided the operating pressures do not exceed 25 psi for steam or 150 psi for water cycles
Lochinvar & A.O. Smith 100108279 Valve 321894-706 or the furnace "short cycling"As a direct replacement for 100108278, the Lochinvar & A. O. Smith 100108279 Valve is a critical safety component designed for commercial and residential water heating systems. This 3 4" temperature and pressure relief valve (T&P) is factory calibrated to discharge at a 150 PSI pressure setting or a 210F temperature threshold, preventing catastrophic tank failure. Engineered with a durable brass body and a thermo bonded coated sensing element, it
