Question about Pentair Fns Plus 48 sqft De Pool Filter (In Ground Pool)
I have a working 13 year old FNS Plus. Recent inpection by pool guy showed that the surface could be indented by a fingernail. He said that indicated the filter could burst as the material is breaking down. Filter gets the Florida sun ~4 hours/day. Is there any truth here or is he peddling a new filter? Or what are the indications of imminent failure, if any.
Sunlight does weaken fiberglass you might be able to just buy the tank or shell a pool retailer should have a parts breakdown and availbility
Posted on Jul 12, 2014
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Posted on Jan 02, 2017
first: Low pressure is actually good. It means that every thing is clean and water is flowing freely. Three things can cause the filter to pass things thru. First is a rip or tear that you might have missed in a filter grid. Second is a cracked manifold.(The manifold is what the grids plug into) Third is the spider gasket may be worn or broken. (This is the gasket in the valve)
Posted on Mar 14, 2010
It may be the hose going from the pool to the pump intake is partially clogged. I had the same problem,, removed the hose and shoved a broom handle through it to remove tree debris.
Posted on Jul 24, 2012
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