Water conservation device

Details Water conservation device Water conservation device

1989-10-16

1991-04-23

Smith, Leonard E.

Pumps

Condition responsive control of pump drive motor

Responsive to pump or pump fluid temperature

417 63, 137337, F04B 4900

Patent

active

050095722

ABSTRACT:
Herein described is a compact and self-contained circular water conservation device which can be easily installed in conjunction with existing and non-existing plumbing systems and fixtures having a source of pressurized water, a hot water supply line, a cold water supply line, a hot water heater, and outlet fixtures coupled to the hot and cold water supply lines. The water conservation device includes essentially an elecric water pump for pumping water from the hot water supply line into a solenoid valve. The solenoid valve prevents the mixture of hot and cold water systems. The solenoid valve is coupled to the cold water line directly leading to and coupled to an outlet fixture. A thermostat temperature sensor is provided for detecting the hot water temperature at the inlet port of the pump. The water conservation device, when in operation, creates a closed loop linking the hot water line to the cold water line. The device moves the cooled hot water into the cold water line, causing immediate hot water to exit any hot water fixture outlet and, thus, conserving water in the process. The device does not require the hot water to be recirculated to the hot water heater. The device is easy to install by any homeowner and is small enough to fit inside a standard bathroom vanity.

REFERENCES:
patent: 3543836 (1970-12-01), Paulson
patent: 3885584 (1975-05-01), Hock
patent: 4201518 (1980-05-01), Stevenson
patent: 4606325 (1986-08-01), Lujan, Jr.

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