masanori Posted June 9, 2013 Report Share Posted June 9, 2013 Can someone tell me the operating psi range. I have pro grid 60 DE filter . Right now my psi is around 18-20. This morning the psi 30 I back washed and added DE. Pressure 18-20 Quote Link to comment Share on other sites More sharing options...
Bugman1400 Posted June 10, 2013 Report Share Posted June 10, 2013 Whenever I break down my DE filter and hose off the grids and then reapply the DE, my pressure is around 12-15 psi. At 25-30 psi, the filter is clogged and will not allow hardly any flow. The problem with backwashing is that it dumps your DE. It also does not do a good job getting the junk off your grids. Typically, I will break down the DE filter twice before the Summer pool season gets going. The sediment that ends up in the pool during the Winter is what gets clogged in the grids the first time. Then, as the pool water gets warmer, the algae starts to clog the grids. When that happens, backwashing will not get rid of the algae. You'll need to break down the filter and hose off the grids. After the two grid cleanings, I am good to go all Summer. Quote Link to comment Share on other sites More sharing options...
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