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all right today were going to talk about how to clean a commercial filter grid set this is a basic compact system [Music] over here you have your filter grids this is your vacuum pump a de separator heres the circulation pump and these are two feeder pumps our flow meter is running were only getting about 30 gallons a minute and heres our switches so the first thing were going to do is shut off our flow from the pool these are the gravity feed valves were going to crank them up this one is for the skimmers and the other one is for the main drain so were going to raise this valve all the way up so the gravity quit the gravity feed stops and the water stops flowing into the tank now they use this as a gravity feed for anti-entrapment purposes so theres no direct suction from the pool and it prevents people from getting trapped on one of the suction points in a drain so now our valves are closed as you can see the water level is going down and as soon as our water gets to the top
