Pentair Coil/Tubesheet Sealing O-Ring Kit | MasterTemp 125 Heater | 474973 AS100P check the part number molded

check the part number molded or stamped on your existing impeller — impeller specifications vary by horsepower rating and are not interchangeable across HP configurations within the IntelliFlo3 / IntelliPro3 line

Mounted directly to the filter housing via a 1/4" bottom-mount connection

IMPORTANT: ADMIRAL SKIMMER DATE RESTRICTION

across flats

and 140HC only

Pentair Coil/Tubesheet Sealing O-Ring Kit | MasterTemp 125 Heater | 474973 AS100P check the part number moldedThe Pentair 474973 is the OEM Coil Tubesheet Sealing O Ring Kit for the MasterTemp 125 Heater the correct replacement when servicing the internal sealing surfaces where the heat exchanger coil meets the tubesheet assembly. IMPORTANT: KIT LISTING MULTIPLE O RINGS INCLUDED This listing is a kit, not a single O ring. It contains the complete set of coil tubesheet sealing O rings required for a full service of the MasterTemp 125 heat exchanger assembly.