Key Benefits: Precise Pressure Regulation: Adjustable settings allow for tight control over compressor suction pressure to match actual evaporator loads

Durable Construction: Engineered to withstand the acidic nature of furnace condensate and the thermal cycles of high-efficiency gas heating

as this 43800013 model is the standardized design for ECR International boiler systems

as it is not for use with older millivolt standing pilot systems

preventing the pressure drops and fitment issues often associated with generic alternatives

Maxitrol MR212D-1010 Valve Refrigerant Key Benefits: Precise Pressure Regulation:For veteran HVAC contractors managing direct fired burner systems, the Maxitrol MR212D 1010 is the specific 1 1 4" NPT modulating gas valve designed for negative pressure applications. Engineered to handle a maximum inlet pressure of 5 PSI, this component functions as both a modulator and a high performance gas pressure regulator, eliminating the need for a separate upstream regulator in most configurations. It is identical to the MR212D 1 1 4,