My DE filter uses about 3.5 Lbs DE, equal to 7 scoops using the blue Leslie's DE measuring cup. Turn off Pump after ~10 seconds.Īfter observing the Multiport Valve Sight Glass, I can get a consistently clear flow in the "Backwash" position (minimum to no DE observed in the Sight Glass) after 10 cycles.Īfter running the 10 cycles, I charge the filter with DE using the "80%" rule, reducing the DE charge amount by 20% from a new (new or completely cleaned grids) charge. Turn on Pump, observe a momentary DE flow from Sight Glass. Turn on Pump, run for ~30 seconds or until the Sight Glass indicates a mostly clear flow. Multiport Valve to "Backwash" position. I'm not sure, but I think I can go longer lengths between Backwashes due to the # of Backwash/Rinse cycles that I perform with my Multiport Valve. I purchased and installed the TFP site PSI Gauge about 6 months ago to get a better PSI reading with the 0-30 gauge vs the standard 0-60 gauges. It's been working ok for me so I'm staying with it after years of previously backwashing using a "pool store" rule of thumb frequency of once a month. I realize that's not generally recognized as the recommended procedure. It's coming up on 6 months since my last Backwash was preformed. Here's my DE Backwash history and method since switching to the TFP pool methods in June 2014:īackwash Date - PSI reading - Duration between Backwashes
The water is too clear and I can see all the imperfections on my (in bad need of re plaster) quartz plaster. no backwashing and my water got a lot of use. literally all I did was put in my half gal a day in bleach and add MA as needed for PH and empty the baskets every few days. My Pool was super low maintenance this summer. this creates a really nasty layering of much and de that is hard to wash off and is frankly disgusting. Then the bit of DE you put back in end up unevenly distributed and also layers on top of the crud that didnt fall. The buildup goes to the bottom of the filter housing and sits there. I think that when you backwash, you knock off the DE layer from the filter mesh. 1 hr of my time, 12 bucks of DE and I am good to go for 4-5 more months (barring heavy rains).
#DE FILTER GRID CLEANING FULL#
From now on, when the pressure hits the limit, its a full clean. So, I am done with the backwash/recharge. The last thing I noticed is that there was not nearly as much gunk in the bottom of the empty filter housing as there was the last time.
The Next thing I noticed is that it was WAY easier to hose off this time around. The first thing I noticed is that it came out much cleaner than when I pulled it after 3 or so backwash/recharges. I Did backwash but then immediately removed the filter and hosed it off. Now, this is normally when I would backwash, then put in more DE. I watched the pressure gauge and to my amazement I made it about 4-5 months before the pressure got up to the point where something had to be done.
Now, we didn't have much rain here in DFW but I get a lot of wind and dust at my place. A few months before the summer I THOROUGHLY cleaned my filter and meticulously added the proper amount (ok maybe a little more than suggested) of DE to the filter. After some thinking on the matter I decided to try an experiment. For several reasons I had come to believe that back-washing then recharging my DE filter was a bad idea.
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