GVO Marine Electronics: We provide reliable, safe online shopping 24 hours a day, 7 days a week throughout the U.S. and the world. We are strongly committed to providing our customers with top quality merchandise and world class service. Model 64167 500GPH Standard Bilge Pump - 24V Customers talk about flow, they want the water out of the bilge, and fast. Improved design and performance means that our next generation 500GPH pump will produce this flow at just 24V rather than 27.2V as previously required...more typical of on board voltage supply. Our next generation of Rule pumps include check valves and to do this, we've created hidden air vent to prevent airlocking. Under each strainer tab there is a small hole that vents any air trapped in the pump housing preventing airlocks...and that's how we do it. We have true electromagnetic suppression (EMC). We have a built-in thermal cell that protects the pump and the vessel when things get too hot. We've re-engineered the inside and outside of our bilge pumps, starting with a blank slate. And we're just getting started Features: Non-automatic - used with a panel switch or Rule float switch Submersible and Ignition Protected High efficiency, low amp motor Stainless-steel shaft Includes backflow preventer Type: Electric Gallons Per Hour: 500 GPH Operation: Non-Automatic Outlet Size: 3/4" Volts: 24v GVO Marine Electronics: . Get the item you ordered or get your money back. Covers your purchase price and original shipping.