Review on Maximize Efficiency with Uniweld 40000 Sludge Sucker: A Powerful Solution for Sludge Removal by Steve Guillen

This thing can actually vacuum most of the time, but when the water hits the venturi the suction power is cut in half or more. * You can block the outlet with your hand and force it to blow back into the condensate pan, then release the drain line and keep sucking to loosen the line that is difficult to clean. In many cases, I still use an overpressure relief device because it's faster and much quieter.