Pentair Fiberglass Sand Filter TR100C-3

Wash the exterior of the filter with mild detergent and water

Ensure no solvents are used during cleaning

Remove sand drain from the bottom of the filter

Flush the filter with a garden hose

Use Pentair Water Pool and Spa® Sand Vacuum P/N 542090 if necessary

Backwash the filter to protect pool equipment from freezing temperatures

Open the manual air bleeder on the closure

Leave the drain plug out to allow slow drainage

Record the initial flow rate (GPM) with a clean filter

Record the current flow rate (GPM)

Calculate the flow rate decrease percentage

Has the flow rate decreased by 30% from the initial reading?

Record the initial filter gauge reading (PSI) with a clean filter

Record the current filter gauge reading (PSI)

Calculate the PSI increase from the initial reading

Has the filter gauge reading increased by 10 PSI from the initial reading?

Is an approved cleaner available?

Contact details of local pool chemical supplier or retail store

Instructions from the cleaner's label

Backwash the filter as outlined on page 8

Is the filter below pool level?

Shut off the pump and close appropriate valving to prevent draining the pool

Ensure suction and backwash lines are open

Stand clear of the filter and start pump

Backwash filter duration (minutes)