Description Rule 25SA 12V 500 GPH 1.9 Amp Automatic Bilge PumpIgnition protected. Double insulated long stack motor. Double strainer non-clogging protection. Compact, efficient and maintenance free. Totally submersible. Runs 100° cooler. No burn-out when dry. Moisture tight PTFE seals. Silent running. Vibrationless. Anti-airlock feature. Housing of heat resistant acetal resin. Heavy 5/16″ stainless steel shaft. Nylon/fiberglass impeller for strength.