I've been getting higher pressure readings on my sand filter (avg 15-18 psi) than most of my neighbours who seem to be around 8-10psi... Having just bought the house last yr, I've spoken to the pool maintenance company that's serviced this house for the past 25 yrs and they show no record of ever changing the filter sand in the filter.
I've heard varying stories in regards to the frequency of changing the sand.
Can anyone clarify the correct frequency for changing the sand?
I do backwash and rinse after pretty much every vacuuming of the pool...
Not sure that this makes a difference, however, it was a non-saltwater pool (close to 30 yrs) until last yr when I converted it...
Thanking in advance
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