Most DC pumps used as part of a back-up system were initially designed to be bilge pumps for boats and although not considered heavy duty, may still perform well.Ī characteristic of a DC system versus an AC system is that the rate that it discharges is related to the degree that the battery power source is charged. A DC based back-up system typically consists of a DC pump, a 12 volt deep cycle battery (2 batteries if a 24 volt system), and a charger. This is based on the total amount of gallons discharged by a pump accompanied by a fully charged battery recommended by the manufacturer.ĭC systems efficiently consume DC current and can run continuously for several hours (up to 10 hours continuously and intermittently for several days). How do these AC/DC back-up pumps differ in function and performance? The best way to compare different available systems is to compare time and performance. The head is the distance that the pump discharges vertically (in a basement, it is usually 8-10 ft). The values should have been generated at an 8-10 ft. While pump qualities differ greatly, pump performance can be determined by an independent testing agency, thus assuring contractors of the highest quality pumps available. To compensate for the possibility of a power outage, the sump pit may include a battery-operated DC or AC driven pump in addition to the primary pump. The sump system in a home typically relies on a heavy duty AC primary pump to discharge water entering the home through its drainage system. Power outage can be a common occurrence during a severe rain storm and can lead to considerable water damage to the home.
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