Mueller B34237 Check Valve 321894-709 This is a relay-specific kit

This is a relay-specific kit

This model is designed for unidirectional flow in the liquid line

Always verify the rotation by looking at the hub side or checking the directional arrow stamped on the original housing to ensure proper furnace blower wheel performance

As a genuine Carrier air inlet assembly

it typically includes a manual crank to allow for field testing and damper positioning during commissioning while power is disconnected

Mueller B34237 Check Valve 321894-709 This is a relay-specific kitThe Mueller B34237 is a heavy duty 1 3 8 ODS 4 bolt check valve designed for demanding commercial refrigeration and HVACR applications. Engineered with a forged brass body, this Streamline series valve provides superior structural integrity and reliability under high pressure conditions, featuring a Maximum Abnormal Pressure (MAP) of 700 psig. The 4 bolt design is a preferred choice for contractors because it allows for easy removal and reassembly of