Abstract: A remote-control valve having at least a two-part housing with a pressure inlet and adjacent outlet in one part, and which valve is opened and closed by a flexible continuous impermeable diaphragm at the base of a pressurizable frusto-conical chamber in the other part of the housing. This substantially conical chamber contains a free rubber ball which closes the apex opening from the chamber when the chamber is pressurized through a continuously open bypass from the inlet duct around the diaphragm in the first part of the housing. A projecting means such as a pin insertable through the apex of the chamber moves the ball away from its outlet duct to reduce the pressure in said chamber so that the pressure in the inlet duct will flex the diaphragm to open the valve to the outlet duct.

Abstract: A valve mechanism for draining a toilet flush tank to either one of two different drain levels selectively, chosen by a single manual bell-crank lever rockable in opposite directions connected to an adjustable link that pushes or pulls a rocking lever between two parallel ball valve tubular extensions having ball valves seated on outlets at the two different drain levels in the tank. At least one of the drain outlets may be vertically adjustable. The outlets may be formed in a manifold which connects into the single outlet of a standard toilet flush tank. The full tank level is controlled by a standard float valve at the top of an intake pipe in the tank. The refill tube from the float valve may be connected to a guide for one of the tubular extensions of a ball valve. These tubular extensions also act as overflow ducts for the tank.