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Filter Pressure Tracker

Set your “clean PSI”, track current PSI, and know when to clean (20–25% rise rule).

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Tip: Pressure changes with flow, valve position, and speed changes. Compare apples-to-apples (same pump speed and valves).

Log

Saved in your browser (this device). Use Download CSV if you want a backup.
Date/Time Clean PSI Current PSI Target PSI Status Notes
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How the Filter Pressure Tracker Works

This tracker uses your clean-filter pressure as the baseline, then calculates the pressure where cleaning is recommended. Enter the clean PSI, current PSI, and choose a 20% or 25% rise trigger.

Each calculation can be added to the maintenance log so you can track pressure changes over time. The log is saved in the browser on the current device and can be downloaded as a CSV file.

Why Clean PSI Matters

Every pool system has its own normal operating pressure. Pipe size, pump speed, valves, heaters, filters, and water features all affect the gauge reading. That is why a generic “normal PSI” number is not as useful as your own clean-filter baseline.

Record the pressure after the filter has been thoroughly cleaned, the baskets are empty, the water level is correct, and the pump is running at the normal speed.

What Can Change Filter Pressure

  • A dirty or clogged filter.
  • A different variable-speed pump setting.
  • Closed or partially closed return valves.
  • Running water features, heaters, or cleaners.
  • A faulty or stuck pressure gauge.

Common Pressure-Tracking Mistakes

  • Comparing readings taken at different pump speeds.
  • Using a baseline recorded before the filter was fully cleaned.
  • Ignoring a pressure gauge that does not return to zero.
  • Cleaning only by calendar instead of watching pressure and flow.
  • Assuming low pressure always means the filter is clean.

Frequently Asked Questions

When should I clean or backwash the filter?

A common guideline is when pressure rises about 20–25% above the clean baseline. Follow the filter manufacturer’s guidance when it differs.

What does pressure below the clean baseline mean?

Possible causes include a lower pump speed, blocked suction, low water level, closed valves, air in the system, or a faulty gauge.

Should I reset the clean baseline after every cleaning?

Record a new baseline when the filter has been fully cleaned and the system is running under the normal valve and pump settings.

Why does my pressure rise again quickly?

Heavy debris, algae, pollen, oils, undersized filters, or incomplete cleaning can cause pressure to climb quickly.

Pool Gal Pro Tip 💦

Write the clean PSI directly on the filter tank with a weatherproof marker. Then you do not have to remember what “normal” was three months later.