What Is Backwash or Backwashing? thespruceofficial Backwash, or backwashing, is a method to thoroughly clean a swimming pool's filter and avoid having to clean it manually. It usually takes just a few minutes. You'll know it's time to perform the backwashing routine when the pressure gauge indicates a pressure rise of 8 to 10 pounds above the clean or "startup" pressure. Read More (Link in Bio) #trends #cleaning #decoratingtips #interiordesign #interiorstyling #interiordesignideas #renovations #tipstosellmyhome #sklarteam #pool #backwash #backwashing #swimmingpool #poolcleaning