shadowless lights also check the check valve is tight
time2012/02/26
shadowless lightsalso check thecheck valveistight,with or withoutair leakagepipe, fittings,foundtheleak,shadowlesslightsafter the demolition ofthejointscoated withoil orblendingpaint,andtighten the screws.shadowless lightsbecause oftheair orthe inletgas accumulation, ortheend of the valvein the pump bodylaxofftheirrigation waterdiscontent,seriousleakofthevacuum pumppacking,gate ordoorclosed lax. shadowless lightsRemedy:firstwater pressureup, and thenpumpfilled with water, and thenboot.