This American made 1/2″ pvc threaded ball valve and the included 3/4″ slip x 1/2″mpt adapter is all you need to transition over from the 3/4″ pvc pipe you should have run to your unit and convert over to the 3/8″ barbed adapter and hose that came with your Watermatic waterer. If you wish to insulate these lines under the waterer, order our winterize kit as well. Better yet, order our deluxe installation kit (DWMIK) and get the stainless steel anchor bolt set, this valve kit, and the insulation kit all with one click of your mouse.