Inquiry (采购产品): Sump Pump I need a sump pump to pump groundwater in the range of 10-15 gpm aganist 15-16 feet of head. Do your pumps have check valves to prevent back flow? Do you have such a pump? If yes, how can I purchase one? **** Hidden Message ***** Peter Marks 1905 Fords Lane Tyrone, PA 16686 USA Company: Private Residence Phone: 814-632-9518 E-mail: pjkmarks@aol.com **** Hidden Message ***** pjkmarks@aol.com
