Pool Filter Cleaning

A Dirty Filter Works Against Your Pool

Your filter catches the dirt, debris, and dead algae that the pump pulls from the water. Over time it fills up, and water has a harder time passing through. Filter pressure rises, flow drops, and the pump works harder for less result. Water may turn dull or cloudy even when the chemistry looks right.

Pool filter cleaning restores that flow. A clean filter traps fine particles better, reduces strain on the pump, and helps sanitizer work efficiently. Most pools benefit from a thorough filter cleaning several times a year, with more frequent cleaning after storms or heavy use.

Filter Types We Clean

Cartridge filters: removing and hosing down each cartridge, and checking pleats and end caps for damage
Sand filters: backwashing and checking the sand bed and multiport valve
DE filters: breaking down the filter, cleaning the grids, and recharging with fresh DE
Inspecting filter tanks, clamps, and O rings for leaks
Checking pressure gauges and air relief valves

How We Clean Pool Filters

Each filter type has its own method, but the process follows the same plan.

Record the Pressure

We note the starting pressure, which shows how loaded the filter is and gives us a baseline.

Clean the Media

We clean cartridges, grids, or sand using the right method, and look for tears, cracks, or worn parts.

Reassemble and Test

We put the filter back together, check for leaks, and confirm that pressure has returned to a healthy range.

Filter Care for Glendale Conditions

Seasonal winds in Glendale carry dust, pollen, and fine debris that load up filters quickly, especially in neighborhoods near the foothills. Very hard local water can also leave mineral deposits on cartridges and grids. During hot summers, pumps run longer and push more water through the filter. Scheduling filter cleanings around these conditions keeps your system running well.

Pool Filter Cleaning Questions

How often should a pool filter be cleaned?

Most pools need a thorough filter cleaning several times a year. Glendale pools often need it more in summer, when pumps run longer and swimmers add oils, and after windy periods that load the filter with dust and leaves.

How do I know my filter needs cleaning?

Note the pressure gauge reading right after a cleaning. When it climbs several pounds above that clean baseline, or the return jets feel weak, it is time for a cleaning.

Is backwashing the same as cleaning the filter?

Backwashing reverses flow to flush debris out of sand and DE filters, and it helps between cleanings. It does not remove oils and mineral buildup, so a full cleaning is still needed periodically. Cartridge filters are not backwashed; the cartridges are removed and cleaned.

When should filter cartridges be replaced?

Replace cartridges when the fabric is torn, the end caps are cracked, or pressure stays high right after a thorough cleaning. We check cartridges during every filter cleaning and let you know when replacement makes sense.

Related Pool Services

Filter cleaning pairs well with weekly pool maintenance. After a big windstorm, see storm debris pool cleanup. If the filter tank or valve is damaged, visit pool equipment repair. Related reading: when to clean your pool filter.