Abstract: A skimmer assembly adapted for installation through an opening in a pool wall from the rear side thereof to mask the otherwise exposed edges of the wall opening, includes a circular type weir involving a float having means for offering resistance to dropping of the float in response to operation of the pool pump, whereby to minimize and stabilize the layer of water flowing over the weir.
Abstract: A sump pump system includes a remote pressure responsive switch assembly designed for a wall plug and having a plug in connection for the pump motor cord, the pressure responsive switch assembly also having an air pressure connection to the sump pump for actuating the switch in response to a rise in level of water around the pump.
Abstract: A system for pumping of liquid under pressure, in which a pressure switch is adapted to control the starting and stopping of the pump within a safe pressure range, and in the event of malfunction of the pressure switch, the service line and associated plumbing is isolated from the pump to protect against development of pressures in the serviceline which might damage the plumbing.