Lochinvar & A.O. Smith 100166325 Pump 322838-753 at least 15 psi should

at least 15 psi should be available to the actuator

and a pipe stop to prevent over-threading

also identified by the 42AF35AF part number

Enhanced Durability: Robust blade geometry maintains airflow stability under varying combustion assembly pressures

Electrical Reliability: High-performance SPST contacts provide consistent electrical continuity for the control board signal

Lochinvar & A.O. Smith 100166325 Pump 322838-753 at least 15 psi shouldThe Lochinvar & A. O. Smith 100166325 Pump Less Volute is a heavy duty centrifugal circulator pump component engineered for high efficiency commercial water heating systems. This replacement pump motor and impeller assembly is designed for rapid integration into existing volutes, minimizing downtime during critical hydronic repairs. Built with a high torque motor and precision balanced impeller, it maintains optimal flow rates in Lochinvar Knight and