Rule 27Da Pump Bilge 1100 Gph 12VRule 27DA 1,100 GPH 12V 3. 7 Amp Submersible Bilge Pump Our bilge pumps provide ultimate pumping performance, which helps keep your bilge clear of nuisance water, building on the genuine Rule design. Rigorous engineering and testing helped generate the DA series of bilge pumps. Our pumps are tested to the highest standard, achieving rated performance at 12V vs. 13. 6V, resulting in higher flow with better efficiency for the toughest applications.