Securly mout your valve to the side fo the valve chamber.
Standard valve bracket in the Watermatic 100,150, and 150S, Omni 1 and 2, EcoFount series, Pork Kings, steel Stall Founts, and Thrifty King for swine and accommodates all 1/2" pressure valves.
3/4" valve plunger pkg with button, nose-piece, and gasket.
This is the only way to buy the 3/4" valve plunger with rubber button without buying the complete valve. It has to come with the correctly dimensioned nosepiece.