Heater Craft Circulation Pump Retrofit Kit Black Friday That means this pump can That means this pump can be threaded directly into your ball valve or other inlet hardware with no adapters and no special sealant for a leak proof installation The ACME 1560 4 Blade Propeller will perform up to and surpass the standards you expect from the moment you pull it out of the box and put it on your boat The circulation pump will efficiently move hot water from the engine to the heater’s coil which in turn will help the system produce warm air through all outputs all the time Easily retrofit a circulation pump to your existing Heater Craft boat heater system with this complete kit