For anyone interested, this past May I installed a Water Commander water powered backup sump pump, after my Basepump did not handle all the water coming into my sump. Water Commander mounts on the ceiling as well and pumps about twice as much as a Basepump, 1,324 GPH, vs 750. They have a model for 1" water lines that pumps 2,136 GPH also. Check it out at www.tanecorp.com.