How Often Should Pool Filters Be Cleaned?

Your pool filter is the kidneys of your swimming pool. While chemicals kill bacteria and algae, the filter physically removes them, along with dirt, oils, and debris. In the Las Vegas valley, high winds and frequent dust storms put an extraordinary load on filtration systems, making regular cleaning critical.

The 10 PSI Rule

Regardless of your filter type, the golden rule of filter maintenance is to clean it when the pressure gauge reads 8 to 10 PSI above its clean starting pressure. As the filter traps dirt, water flow is restricted, causing pressure to rise. Ignoring this puts immense strain on your pool pump, leading to premature motor failure and poor water circulation.

Cartridge Filters

Cartridge filters are highly popular in Southern Nevada. For a standard residential pool, these should typically undergo a full teardown and deep cleaning every 3 to 6 months. During monsoon season or after heavy dust storms, they may require more frequent attention.

D.E. (Diatomaceous Earth) Filters

D.E. filters provide the finest filtration available. They should be backwashed when pressure rises, but they also require a complete teardown, grid inspection, and thorough cleaning at least twice a year (typically spring and fall) to remove compacted D.E. and oils that backwashing leaves behind.

Sand Filters

Sand filters require regular backwashing (usually every few weeks depending on the season). However, the sand itself degrades over time and calcifies due to our hard water. The sand media should be completely replaced every 3 to 5 years to maintain effectiveness.