Convenient way to install a pressure on demand system. It is recommended that a surge damper is also fitted.Switches the pump on/off by detecting the change in pressure in the water system. Recommended for use with whale submersible and inline pumps. Can be used in conjunction with Whale Elegance, Elite & TB faucets. One switch operates multi outlet system. Prevents pump cycling on & off. Enables water systems to be converted to an efficient pressure system