PMP-BLGA11-DPHYDRA™ Automatic Bilge Pump - 1100 GPH - 12V The T-H Marine HYDRA™ Automatic Bilge Pump is engineered for reliable, high-performance water removal with long-term durability built in. Backed by 4,000 hours of testing, HYDRA delivers dependable operation through its advanced anti-airlock design, ensuring reliable restarts even when air is present in the line. A precision-balanced motor with a 316 stainless steel motor shaft reduces vibration, noise, and corrosion for smooth, long-lasting performan