Lochinvar & A.O. Smith 100109724 Valve 320074-702 The external equalizer compensates for

The external equalizer compensates for the pressure drop across the evaporator and distributor

Class 2 Safety Rated: Inherently energy-limiting design reduces fire risk and protects sensitive downstream control boards

you typically require the Allanson 2721-628G

maintaining millivolt system integrity

Measure the resistance across the leads and compare the value to a standard York 10K chart

Lochinvar & A.O. Smith 100109724 Valve 320074-702 The external equalizer compensates forThe Lochinvar & A. O. Smith 100109724 Valve is a direct fit OEM replacement gas control designed specifically for high efficiency water heaters and residential power vent boiler systems. This natural gas valve operates on a 20V ignition circuit, featuring a 1 2" NPT inlet and a factory set 4" WC manifold pressure to ensure precise fuel to air ratios and stable combustion cycles. Engineering specifications for the 100109724 include a 1 1 4" shank