Top Water Pump – A List Of Whole House Water Filter Manufactuerers, FailurePossible CausesMethods1.Pump not suck water, both pointers of manometer and vacuometter severly jump. a:Water input the water pump is not enoughb:Air leakage on water input pipes and instrumentsa:Input more water into water pumpb:Tighten and block the air leakage parts2.Pump not suck water, high vacuum shown on vacuometera:Bottom valve not opened or blocked upb:Too large resistance of the suction pipelinec:too high suction heighta:adjust or replace bottom valveb:clean or replace.