My pressure tank unit isn’t sucking. What could be the problem?

Pressure tank units shutting down is usually due to leaks! The suction side must be 100% air-tight and vacuum-tight in order for the pressure tank unit to work properly. This is the only way for the devices to reach sufficient vacuum/suction to suck up the water properly when in suction mode. The lower the water level, the higher the negative pressure required on the suction side. Note: air leaks are often still water-tight (invisible)! Even the smallest leaks can become an issue at large depths of suction. It may be the case that suction works when level (e.g. from a bucket or pool) but not at depth due to tiny leaks. When troubleshooting/looking to see what is causing a problem, refer to our Service information on suction issues with pressure tank units.