Mueller A17921 Manifold 319825-402 Optimized Performance: Restores factory-standard solenoid

Optimized Performance: Restores factory-standard solenoid valve operation

and cooling towers where a 460V 1PH motor is required for fan propulsion

Standardized Flow Control: The 1/2" NPT ports and matching 1/2" orifice provide a balanced Cv for efficient fluid transfer

Whether you are performing a radiator trap repair or a new installation

This OEM transducer is frequently utilized in high-side refrigerant loops and pump discharge monitoring where rapid response times and long-term stability are non-negotiable for system protection

Mueller A17921 Manifold 319825-402 Optimized Performance: Restores factory-standard solenoidThe Mueller A17921 ReliefMaster is a heavy duty change over manifold engineered for high demand industrial and commercial refrigeration applications. This HVACR manifold features a 1 2" NPTFE (National Pipe Thread Fuel Extended) inlet and 1 2" NPTFI (National Pipe Thread Fuel Injection) outlets, providing a secure, leak proof transition for dual relief valve setups. With a design pressure (MAP) of 700 psig and a broad operating temperature range of