Rule Pumps 27DA, automatic 1100 GPH fully submersible 12 volt DC bilge pump offers many design features while keeping size and cost to a minimum. Especially popular on smaller craft, they are unmatched in pumping power and longevity. It features an easy clean snap lock strainer, silent and vibration less operation, anti-airlock protection, compact, efficient long life motor, marine grade blocked wiring, ignition protection, no burn-out when run dry and rust and corrosion protection. Automatic 12 volt DC pump at 1100 GPH – keeps water below 1/2" by turning on every 2.5 minutes to sense for water3 Year WarrantyNo float switch requiredBack Flow Prevention - reduces the amount of waterHidden Air Vents in the Body – helps prevent air locksThreaded Discharge - easier installation, easier maintenanceHigher Flow – optimized impeller to provide greaterBuilt-in Thermal Cut-Off (TCO) – provides addedISO and CE certifiedMarine grade blocked wiring