Liberty Pumps SJ10, Water Powered Back-Up Plumbing Pump

Liberty Pumps SJ10, Water Powered Back-Up Plumbing Pump Ensures your basement remains dry during power outages with a reliable water-powered backup system Powered by your municipal water supply, eliminating the need for electricity to operate Features an indoor alarm that runs at 115V with a 9V backup battery for added safety Requires an uninterrupted water source; not compatible with well pumps during outages Factory pre-assembled for easy installation, with a discharge size of 1-1/2" NPT