Yes, we installed a Pentair Clean & Clear (Raised Port) 150 - 200 sq ft cartridge filter today.
Note: This filter body fits 2 different (same-sized) cartridges, approx 10" X 31", one is 150 sq. ft., the other is 200 sq. ft.
Saturday morning we added chemicals, added water, and ran the old filter for about two (2) hours before shutting down and starting demo.
Next, we removed the 25-year-old stainless steel Nautilus 36 DE filter along with its slide valve. That big tin can was cracking, leaking and rusting, and replacement parts are not entirely available for the old Nautilus. The replacement manifold we purchased never really worked well, and the grids recently cracked, spewing DE into the pool. When it worked well, it was great, but it hasn't been great for over a year.
Enough was enough; time for a new era in filter maintenance.
The heat pump was originally installed on the wrong side of the equipment pad, because it was installed years after the pump and filter. The heater's 2 permanent fittings face the wrong direction, and now the filter's in and out connections are in very different locations than they were before. So we have more elbows than we'd like (Ups and downs and lefts and rights.). Well, they say that the slower your water moves through the filter, the better filtered it is. Ours will be filtered very nicely, thank you. Actually, it seems the cartridge filter provides less resistance than the DE-grid filter, as the clean-filter pressure is somewhat lower and the movement of the water in the pool is more energetic.
We were able to plumb the vacuum-to-waste drain pipe via a new valve before the filter, instead of the backwash-filter-to-drain we had before. One nice feature we retained is the waste pipe which is connected to the house drain.
We only wasted one fitting and a couple of inches of pipe from a bad glue job at a tough angle. Not bad for a day's work. All in all, we removed about 12 feet of pipe, and added 12 feet. We ran it for about 1/2 hour. No leaks. How did that happen? Dinner time.
We are looking forward to filtering out the suspended DE in the pool, and then vacuuming the remaining DE off the bottom. We had been vacuuming to backwash-waste occasionally for 2 weeks, but some DE always returned to the pool. We know we'll likely have to clean the new filter soon, and often, until all the DE is out of the system.
It was just getting dark as we were cleaning up our tools and trash. You can bet we'll be waking up with thoughts of a trouble-free filter, and lots of smiles, in the morning.