Rule 500 GPH Straight Seacock Livewell Pump

The Rule 500 GPH Straight Seacock Livewell Pump supplies a nominal 500 gallons per hour for a compatible baitwell or livewell plumbing system. This 12V model uses a straight 3/4-inch NPT seacock inlet and a 3/4-inch discharge hose barb. Its listed electrical requirements are 3.0 amps with a 5-amp fuse, which differ from those of the 1100 GPH model.

A straight inlet arrangement can be useful where the pump mounts directly to a seacock, provided the installation has the correct threads and room for service. Rule includes anti-airlock provisions to support reliable circulation, along with a secondary inlet intended for a compatible washdown connection. The pump's motor can be removed with a twist-and-click cartridge mechanism instead of unthreading the full assembly.

For replacement work, measure the existing hose connection and verify the boat's available circuit capacity before selecting this particular flow rate. The catalog identifies 65DR as the matching replacement motor cartridge. After fitting the unit, inspect for leaks at the inlet, confirm steady livewell flow, and leave enough access for future cartridge changes.