Store Heater Union 2" Split Nut Waterway 400-5421 $3.50 Heater Union 2" Split Nut Waterway 400-5421 $3.50 Part Number: 4005421 Heater Union - 2" Split Nut w/ screws (#4005421) Mfg. #400-5421 Maximum quantity exceeded Minimum purchase amount of 0 items is Required Maximum purchase amount of 0 is Allowed 3.500 10000000 Manufacturer: Waterway Description Heater Union - 2" Split Nut w/ screws (#4005421)Mfg. #400-5421 Product Search