Johnson Pump CM30P7-1 Circulation PumpThe Johnson Pump CM30P7-1 is a heavy duty magnetically driven circulating pump. Compact but powerful, this is an ideal pump for circualtion duties such as water/antifreeze in heating systems or for circulating cooling fresh water. The CM series pumps by Johnson are normal-priming centrifugal pumps and should be mounted in a manner that ensures that they are always flooded or else be primed before switching on.Features: Pump Body: PPA, Thermoplastic; Shaft: Stainless Steel; Impeller: PPA, Thermoplastic; Specifications: Voltage: 12; Port size: 5/8" or 3/4" hose; Minimum Liquid Temp: -40 F; Maximum Liquid Temp: 212 F; Dry running: 30 minutes max; Input Power: 27W Max; Mounting: Separate universal bracket for flat surfaces; Capacity: 5.3 GPM; Length: 6.97"; System Pressure: 2.5 bar max (36 psi); Width: 2.68"; Height: 3.35;