Hello there! I've been a lurker for a few years, 25,000 gallon gunite inground pool, North Texas, Hayward DE Filter 60 sq ft, 1.5 hp pump, polaris cleaner with booster pump, gas heater. Use Poolcalculator and TPF to maintain. After three years of successful DIY, our filter (original on the 20+ year pool) has developed a crack and we are looking for a new one, as the housing has been discontinued and no-one on Craigslist has one. Time to stop being a lurker and post a thread! So, Pentair or Hayward? Can I use my nearly brand new multivalve port and brand new filter grids if I switch to Pentair?