The pressure gauge on a pool filter is used to measure the pressure inside the filter tank. The pressure will naturally increase as the filter accumulates debris and contaminants from the pool water. As a result, periodic monitoring of the pressure gauge is necessary to determine when it's time to clean or backwash the pool filter.
The specific pressure range can vary based on the type of pool filter (sand, cartridge, or diatomaceous earth), the size of the filter, and the manufacturer's recommendations. However, as a general guideline:
Clean Filter Pressure: Note the pressure on the gauge when the pool filter is clean or has just been backwashed. This is sometimes referred to as the "start-up" or "clean filter" pressure.
Dirty Filter Pressure: As the filter collects debris and particles from the pool water, the pressure on the gauge will increase. The pressure will rise gradually over time.
Maximum Recommended Pressure: There is usually a maximum recommended pressure specified by the filter manufacturer. When the pressure on the gauge approaches this maximum value, it indicates that the filter is becoming clogged and needs to be cleaned or backwashed.
Backwash or Cleaning: When the pressure reaches a certain point above the clean filter pressure (often 8-10 psi above), it's time to backwash a sand or DE filter or clean a cartridge filter.
Always refer to the manufacturer's guidelines and recommendations for your specific pool filter model. Regular maintenance, including cleaning or backwashing the filter when needed, is crucial to ensure optimal performance and water clarity in your pool. If you're unsure about the proper pressure range for your pool filter, consult the owner's manual or contact the manufacturer for guidance.