Rule-Mate 1500 GPH 12 Volt Fully Automated Bilge Pump. The Rule-Mate RM1500A combines a powerful Rule bilge pump with an intelligent circuit board in one housing. It activates automatically when water reaches 2-1/2" and shuts off when no water is sensed at the impeller, leaving approximately 5/8" of water. Rule-Mate intelligence senses when the pump is running but not pumping and will pause and re-check every 2-1/2 minutes if debris fouls the sensor or the pump is air-bound, protecting motor and vessel batteries. Features include 1500 GPH (6819 LPH) at 0' (13.6V), extra-long life heavy duty motor, 1" NPS discharge with 1" and 1 1/8" screw-on ports, automatic operation, and a three-year warranty. Material: Plastic. Ideal for marine bilge pumping applications. WARNING: This product can expose you to chemicals including FORMALDEHYDE (GAS) which is known to the State of California to cause cancer. For more information go to P65Warnings.ca.gov.