The invention discloses a
water heater water-saving
system. One end A of a first pipeline is in communication with a hot water outlet
pipe, the other end B of the first pipeline is in communication with a water tank, a first valve and a water pump are arranged on the first pipeline, an opening is formed in the upper part of the water tank and is in communication with the
atmosphere, and the firstvalve is in a normally
closed state. Before hot water is used, the first valve is opened to
discharge low-temperature water in the hot water outlet
pipe into the water tank. After the hot water is used, the first valve and the water pump are opened, and the water in the water tank is pumped back to the
water heater. A second pipeline is additionally arranged, and the water pump can be used for pressurizing so as to supply water to the non-pressure-bearing
solar water heater. The opening is connected to an automatic exhaust device to prevent the water from overflowing from the water tank. The first valve is an
electromagnetic valve, the upper part of the water tank is provided with a
liquid level sensor, the
electromagnetic valve and the
liquid level sensor are connected to the controller,and the
water level in the water tank is limited by the controller. According to the
water heater water-saving
system, the problem of water resource waste caused by low-temperature water in the hot water outlet
pipe is discharged before the water heater is used is solved, the operation is simple and convenient, and the cost is low.