B and VP517 Series valves without the need for additional adapters

and industrial water control

should show low resistance

while counter-clockwise decreases it within the 60-338 PSI range

OEM Precision: Ensures exact fit and function as specified by Marley Engineered Products for 410170001

White-Rodgers 1145-33 Control THPU32HP7Y B and VP517 Series valvesThe White Rodgers 1145 33 is a high performance direct immersion hydronic control designed for rapid temperature sensing in boiler and hot water systems. This SPST aquastat features a liquid filled 11 3 16" fast response bulb that sits directly in the water stream, virtually eliminating thermal lag for precise cycling. As a veteran grade high limit control, it operates on a temperature rise to open logic within a 100F to 240F range. The unit includes