AQUA KING™ II Junior Fresh Water Pump - 12 VDC, 2.0 GPM SHURFLO's 4128 fresh water pump design was created with a unique over-molded single-piece diaphragm, assuring long life and top performance in all plumbing systems. Designed as the next legendary pump, the 4128 pump is constructed for smooth flow. The 4128 fresh water automatic demand pump is quiet, thermally protected and can run dry without damage. Features: * 2901 Replacement * Sealed Switch * Sealed Motor * Corrosion Resistant Electro Coated Motor * 4 Independent Chambers * Built-In Check Valve * Co-Molded Diaphragm * Adjustable Switch * Self-Priming up to 6 Feet * Dry Run Capability * Thermally Protected * Ignition Protected, CE