this is for a topoff pump from the basement to my sump. it makes an horific noise when the pump shuts off after toping off and plus i feel as though it will save the pump some pushing power. i think i will have to redo my hose and the barb fitting on my pump, im not able to track down a 5/8inch. o.d. check valve.i also did leave myself plenty of room for any power outages, believe it or not i check that myflooding precautions pay off everyday.