As bilge water collects, you can rely on the Rule Rule-Mate 500 gph Automatic 12 V Bilge Pump to help manage it. The pump is powered by a 12-volt battery and durably constructed for long-lasting use in corrosive saltwater environments. For safety, it automatically shuts off in the event of overheating and features an automatic fail safe mode to deal with debris. Threaded discharge. Rule Rule-Mate 500 gph Automatic 12 V Bilge Pump - Marine Accessories at Academy Sports