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04-17-2014, 08:51 AM
Hi all - newbie here so please be gentle.
We have owned a 25,000gal. oasis style salt water pool that came with a foreclosure for about a year now. After many $$$ later, we enjoyed a great season of swimming last year. We have a Pentair FNS 48sq. ft. filter. I upgraded to a multiport turn style valve vs. the push/pull type, so it is brand new. When I went to hose the grids down this past week I found that there was DE INSIDE the grids. After inspection, there were a couple of fabric separations at the seems at the top of a couple of the grids. Nothing that would warrant the amount of DE that was inside the grids. The mushroom filter was absent on the top of the manifold. I still have no idea where it went. I also replaced that with the sock-type. After spending an hour hosing the grids down and getting everything out, I sewed the small tears shut, reinstalled them, replaced the "O" ring that the manifold sits on top of, inspected for cracks in the manifold (found none), and then restarted the system. As I added DE, here came the blowback into the pool. I opened the filter and DE was inside the grids again. Each of the grids also had air in them almost like a balloon. Before you ask, I do NOT have the system on backwash when adding DE. Grids are probably 10 years old, but are really in good shape for their age. No cracks or breaks around the necks, a few of the ribs have broken, but aren't impeding flow. Any suggestions or insight would be appreciated.
Tom D.
Athens, GA
We have owned a 25,000gal. oasis style salt water pool that came with a foreclosure for about a year now. After many $$$ later, we enjoyed a great season of swimming last year. We have a Pentair FNS 48sq. ft. filter. I upgraded to a multiport turn style valve vs. the push/pull type, so it is brand new. When I went to hose the grids down this past week I found that there was DE INSIDE the grids. After inspection, there were a couple of fabric separations at the seems at the top of a couple of the grids. Nothing that would warrant the amount of DE that was inside the grids. The mushroom filter was absent on the top of the manifold. I still have no idea where it went. I also replaced that with the sock-type. After spending an hour hosing the grids down and getting everything out, I sewed the small tears shut, reinstalled them, replaced the "O" ring that the manifold sits on top of, inspected for cracks in the manifold (found none), and then restarted the system. As I added DE, here came the blowback into the pool. I opened the filter and DE was inside the grids again. Each of the grids also had air in them almost like a balloon. Before you ask, I do NOT have the system on backwash when adding DE. Grids are probably 10 years old, but are really in good shape for their age. No cracks or breaks around the necks, a few of the ribs have broken, but aren't impeding flow. Any suggestions or insight would be appreciated.
Tom D.
Athens, GA