When performing a Reznor heater fan blade replacement

making it ideal for freeze protection in outdoor hydronic loops

used on the larger

This is the idler pulley and bearing assembly

monitoring current draw and heat buildup to prevent winding failure during a locked rotor condition or sustained overcurrent event

Watts 0888141 Parts Kit 326058-757 When performing a Reznor heaterWhen you are out in the field servicing a 3 4 inch Watts 919 reduced pressure zone assembly, a leaky relief valve or failing check seat usually points to compromised rubber components. The Watts 0888141 rubber parts kit is the technician's standard for a full overhaul of the soft internals. This RK 919 RT 3 4 kit provides everything needed to restore the backflow preventer to original factory sealing specifications without requiring specialized tools