texasmax Posted September 4, 2012 Report Posted September 4, 2012 60sqft DE filter, about a year old, backwashed for 5-10 minutes each time every other month or so, and each time, it got down to within .5psi of it's brand-new state (initial coat didn't raise the psi at all). Still 100 degrees in Dallas, but thought it was time to break it down and see what sort of maintenance it really needed. For all the folks that tell you a backwash is no substitute for a breakdown-and-clean, well, they're right. It's unusual, though, that I was always able to get it to within half a psi within of "perfect" condition (though after each backwash, it took less and less time for the pressure to build). And yes, it got a full 6lbs of DE after each "backwash". Had a cartridge filter for years, and will start cleaning this one the same way. Quote
waterbear Posted September 4, 2012 Report Posted September 4, 2012 That is exactly what I say that a DE filter needs to be broken down and not backwashed or bumped! With that much bridging of the DE you were not getting much filtration. Quote
texasmax Posted September 4, 2012 Author Report Posted September 4, 2012 And I was wondering why I kept seeing the same "stuff" on the steps and the floor of the spa... ! Quote
texasmax Posted September 4, 2012 Author Report Posted September 4, 2012 And, from my notes, about 5-8gpm less at the same pressure. Quote
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