Carvin 1-1/2" FBT x 1-1/2" S Black Pump Union [Qty 2] (31175608R2-BLK) filters Check valves are useful because

Check valves are useful because they help prevent undesirable reverse flow that can interfere with normal system performance

Genuine or listed Pentair/Sta-Rite replacement option for Fittings & Valves: Dial Valves applications

Helps restore dependable valve selection and control

installation can be cleaner than trying to piece together separate components

Raypak R405 burner tray without burner

Carvin 1-1/2" FBT x 1-1/2" S Black Pump Union [Qty 2] (31175608R2-BLK) filters Check valves are useful becauseThe Carvin pump union set is designed for compatible 1 1 2 inch plumbing applications where a serviceable connection is needed at the pump. A union like this is useful because it helps create a removable plumbing joint, making future maintenance or equipment removal easier without sacrificing a secure installed fit. This black two piece set is especially useful when the original unions are cracked, leaking, worn, or no longer threading together