the pressure differential forces the balls against their seats to stop the flow of liquid or steam

this is an auto-reset switch designed to automatically restore the electrical circuit once the sensed temperature drops back down to the 90-degree Fahrenheit reset point

Its compact rotary design minimizes vibration and noise levels while maintaining consistent discharge pressures

As a direct replacement for HT36DM434

Designed without a manual lift stem

Lochinvar & A.O. Smith 100277785 Pump 30067439-890 the pressure differential forces theThe Lochinvar & A. O. Smith 100277785 Pump is a high performance 115V wet rotor circulator pump designed for precise flow management in commercial and residential hydronic systems. Featuring a 1 6 HP motor, this 3 speed pump assembly allows technicians to dial in the exact head pressure and GPM required for specific boiler or water heater loops. Constructed with a stainless steel housing and essential mounting hardware, it is an OEM replacement for