This pump will self-prime at low or high speeds. Make sure that all connections are airtight. This pump has a 12 Volt DC electromagnetic clutch with a 2-A Pulley and Shielded Ball Bearings. Electromagnetic clutches can be operated remotely via float or Hydro Air switches, while fitting a vacuum switch eliminates all risk of dry running damage. However, electromagnetic clutches will only engage as long as electrical power remains available. These 12 Volt models are equipped with mechanical clutch engagement screws in case of electrical failure. To mechanically engage clutch, loosen locking nuts, tighten allen head screws and retighten locking nuts. Reverse procedure to disengage clutch. If the mechanical engagement feature is not desired, the screws may be removed. Do not run pump dry for more than 30 seconds as a lack of water flow may damage impeller. Pump may be mounted in any position. Intake and discharge ports are determined by the direction of shaft rotation (refer to dimensional drawing). Before installing, energize clutch and turn pump shaft in direction of shaft rotation. Drive pump with two A size belts. Avoid dry-running by using Vacuum Switch Model 4732-0000 for automatic shutoff. This pump has a Maximum flow rate of 23 GPM (87 LPM) and is self-priming from 7.8 feet (2.4m) when dry, and will lift fluid up to 22 feet (6.71 meters) when wet.
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