CMP Brand drain valve with a 1/2" socket and an adaptor to make it 3/4" barbed. So, you can use either 1/2" or 3/4" pipe. To use the 3/4" connector, it would need to be glued into place. (The picture shows it with the 3/4" connector attached)
Waterway Drain valve cap and o ring. Internal diameter of the screw thread is 25mm. Cap : 519-0231 O ring : 806-0100 (429-4400 was the old code)
Jacuzzi drain valve 2000-035 1" socket pipe connection
Waterway drain valve with a 1/2" water pipe connection and mounting assembly for attaching through a spa side. Features:Drain On / Off Valve with NicheHose bib pulls out for easy accessProtective cover seals against all possible leak pointsPlumbs to 1/2" flex hose
Waterway drain valve with a 3/4" water pipe connection and mounting assembly for attaching through a spa side. Features:Drain On / Off Valve with NicheHose bib pulls out for easy accessProtective cover seals against all possible leak pointsPlumbs to 3/4" flex hose