PRO Series® 20320 1 gal Pipe Purge. Pro Series Pipe Purge attacks the root cause of most pool maintenance problems, the buildup of non-living organic waste contamination. Contaminants like oils, lotions, sunscreen, cosmetics, and hair products, are the underlying root cause of many pool issues. High non-living organic loads can cause cloudy water, hard to maintain water chemistry, clogged filters, foaming and nasty waterline rings. These contaminants collect and buildup in pool circulation systems and filters. By purging the pool of this buildup, the symptoms of high non-living organic loading will be reduced.