AQUA KING(TM) II Junior Fresh Water Pump - 12 VDC, 2.0 GPMSHURFLO'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