Hayward Trimline 2-Way Ball Valve [1-1/2" FPT] (SP0722) presairtrol and compression swing design give

and compression swing design give this valve practical value because check valves work best when the replacement matches the plumbing size and the system benefits from visible internal inspection

4 inch related fit supports intended assembly matching

The Waterway 500-1600 piston assembly is designed for compatible 2-1/2 inch slide valve applications

CMP Hydroseal 2-port diverter valve

The D-1 compatibility

Hayward Trimline 2-Way Ball Valve [1-1/2" FPT] (SP0722) presairtrol and compression swing design giveThe Hayward Trimline 2 way ball valve is designed for compatible plumbing applications where inline shutoff control is needed through a threaded connection setup. A 2 way ball valve is useful because it allows water flow to be opened or closed along a single path, supporting maintenance, line isolation, and everyday system control. This replacement is especially useful when the original valve is cracked, leaking, stiff, or no longer turning or sealing