I am having issues with blown filter cartriges in my Pentiar DE Quad 100 Filters. The pool is new this spring and opened in May.
Pool Characteristics:
1) 50,000+ gallons
2) Two Pentair DE Quad 100 Filters (One filter is assigned to the 12 foot deep end. The other filter is assigned to the 3 skimmers)
3) Three Pentair 3HP Intelliflo VSP pump. Each filter has its own pump. the other pump feeds rock slide and waterfall.
4) Return line is 2" and the flow can be split between the 6 returns and/or 2 shelf bubblers. (Both filters join into the same return 2' return line.
5) Pentair Hybrid heater
6) SWC generator
7) Sun shelf with 2 bubblers
8) Waterslide and slide
History:
At the begining of July we came home to the entire pool floor coated in DE powder. The filter was opened and it was found that all 8 filters had ruptured through the blue rubber end cap. Spoke with my pool maintanice company and and no reason could be identified as the cause. New filters were placed and we moved on hoping it was a weird one time event. Recently larger white flakes started to appear at the return ports. My pools service said it was "pool dandruff" coming from the SWC and recommended an additive to help controll scaling. Today the filter was opened and we found that about 2/3 of the filters had ruptured. This time the pool service thinks it may be the highflow backwash valve causing the problem. I am at a loss as to the reason of continued filter cardridge failure. Any help would be appreciated.
Thanks
