How do I backwash my filter without wasting thousands of gallons?

“In Austin, every gallon of pool water is precious—especially during a drought.”

Backwashing is necessary to keep your sand or DE filter working, but it can dump 200–500 gallons of water in minutes. During Austin’s Stage 2 water restrictions, this can feel like a waste.

Expert Efficiency Tips:

1. Watch the Sight Glass: Don’t just backwash for a set time. Stop as soon as the water in the sight glass runs clear. Every extra 30 seconds is 50 gallons.
2. Rinse is Vital: Always run the “Rinse” cycle for 30 seconds after backwashing. This settles the filter bed and prevents “dirty puff” from returning to the pool, which would just force you to backwash again sooner.
3. Upgrade to Cartridge: If you’re tired of wasting water, consider upgrading to a large cartridge filter. They don’t require backwashing at all; you just pull the cartridges out and hose them off twice a year.

Austin Detail: Most Austin soil is clay-heavy. If you drain too much water too fast, it won’t soak in and will create a muddy mess. Route your backwash hose to a well-mulched area or the sewer cleanout.

Sent from my iPhone while backwashing a filter in Cedar Park.