1-inch Air Control plunger/diaphragm part 662-2140 is used in select 1 inch Waterway air controls.
This part is just the plunger.
We also offer a 1 inch air control upper seal
Gate Valve 2" Slip x Union Unibody Valve 0516-20 is a unionized service valve for hot tubs with 2 inch inner diameter flex hose or pipe plumbing systems.