A/C condensate drain pan overflows are a very common and costly service problem. The overflows are caused by slime and sludge that builds up and clogs the drain line. The A/C Drain Sucker quickly removes the clog and excess water, resolving the overflow problem. The kit also includes PurCool® Green 3 Ton Tablet (#61048) to clean and treat any remaining slime and sludge left in the pan and lines, providing months of preventive treatment and free-flowing drains.