slotted hubs 42 allow axle 36 and rollable ball gate 38 which are acted on by the water pressure to move transversely towards perimeter chamfer 40 on intake side 24 to better seat and seal gate 38 against chamfer 40 there is reduced friction between intake side 24 and ball gate 38 and also reduced attendant wear associated therewith as a result of these structures the carriage may be caused to move by a manual lifting of knob 49 knob 49 is linked to rod 44 which in turn links at its lower end to an acceptor 46 on the carriage a bolt or other fastener 47 retains the rod 44 in the carriage acceptor 46 the lower o ring 48 is provided to prevent leakage up through the top of the spout hole 51 the upper o ring is primarily present as a bumper note that the carriage is preferably installed first before the rod 44 as a result the parts can be made to snap together modifications and variations to the preferred embodiment will be apparent to those skilled in the art which are intended to be within the spirit and scope of the invention for example while an.