Engineered with industrial-grade metal housing for high durability and environmental resistance

Accurate Resistance Curve: Matches original factory specifications for accurate thermistor resistance readings across all operating temperatures

ensuring smooth door actuation without over-stressing the motor

preserving system static pressure and protecting sensitive boiler replacement parts from heat degradation

it offers exact physical and electrical compatibility with a wide range of mobile home furnaces and standard residential air handlers

McDonnell & Miller 314100 Valve Gasket Engineered with industrial-grade metal housingThe McDonnell & Miller 314100 Valve Gasket is a critical sealing component engineered for high performance boiler water feeders and low water cut off systems. As the direct updated replacement for the obsolete 312900 model, this 37 28 gasket features a precision two hole design that ensures a leak proof interface between the valve and strainer assemblies. It is specifically designed for technical compatibility with Series 53, Series 3155, Series 21,