4.0 GPM High Flow By-Pass Pump - Introducing SHURflo's latest pump creation, the 4048 RV Pump with Flow Reaction By-Pass Technology for smooth, low cycling, high-powered flow. This automatic demand pump combines the following features - all accomplished without the need for complicated electronics: Reduced cycling with flow reaction technology, Eco-Friendly design for reduction of hazardous waste and power use. Automatic thermal overload protection. Can run dry without damage. Built-in check valve prevents backflow, Dry primes to 6 vertical feet. Variable speed 4 chamber design. Automatic voltage protection. No pressure switch needed. Seamless heat electro-coated motor shell and Thermally protected. It is a 4900 and 5900 Smart Sensor replacement. This fresh water pump is specifically designed to provide mid-size RV's with a "Just Like Home" flow and pressure to drastically improve the performance of showers, toilets, sinks, washing machines, dish washers and whole-house filtration units. Meets CSA, CE, e-Mark, and C-Tick standards. This 12 Volt DC Version runs at 4.0 GPM Flow Rate / 55 PSI / 10 Amps Maximum. 2 Year Warranty. Dimensions: 8.25 inch x 5.25 inch x 4.75 inch. 1 per package.