Pool Filter Cleaning, Done the Right Way.
Full teardowns, soaks, and inspections for DE, cartridge, and sand filters. Not a thirty-second hose-off.
Start With the Pressure Gauge
If you want to know whether your pool filter needs cleaning, do not look at the water. Look at the gauge on top of the filter tank. Every filter has a baseline pressure when it is clean, usually somewhere between 10 and 15 PSI depending on your plumbing and pump. When the needle climbs 8 to 10 PSI above that baseline, the filter is loaded and your circulation is suffering, even if the water still looks decent.
The catch: almost nobody writes the baseline down. So the gauge reads 28, and the homeowner has no idea whether that is normal. When we take over a pool, recording the clean starting pressure is one of the first things we do. From then on, the filter gets cleaned when the gauge says so, not when somebody remembers.
Other signs you are overdue: the skimmer barely pulls, the pump sounds strained, the pool clouds up by the end of the week, or your suction-side cleaner crawls instead of climbs. All of those usually trace back to a filter that has quietly stopped doing its job.
A Real Cleaning Is a Teardown, Not a Rinse
Plenty of companies "clean" a filter by spraying it for thirty seconds and bolting the lid back on. That removes the loose debris and none of the oils, sunscreen, and fine silt packed deep in the media. Here is what the job actually looks like when we do it.
Cartridge filters
We pull every cartridge out of the tank. A Pentair Clean & Clear Plus holds four, and all four come out, every time. Each one gets rinsed pleat by pleat, then soaked in a degreasing solution if the pleats are slick with body oils. Scaled cartridges get an acid bath, but only after degreasing. Acid first sets the oils into the fabric permanently, and we see that mistake constantly on pools coming from other companies.
DE filters
The tank comes apart and every grid gets hosed clean and inspected for tears, because one ripped grid sends DE powder straight back to your pool. We check the manifold for cracks, lube the belly band o-ring, reassemble, and recharge with fresh DE through the skimmer. Hayward and Pentair DE tanks each have their own quirks; we know them both.
Sand filters
Routine backwashing keeps sand working, but the media still channels and hardens over the years. We backwash on schedule, watch for signs the bed is failing, and handle the full sand change with a lateral inspection when the time comes, typically every 3 to 5 years.
Not sure what shape your filter is in? Ask us.
Get Your Free QuoteSometimes the Honest Answer Is a New Cartridge
Cartridges do not last forever, but they last longer than most companies admit. Expect one to two years from a quality cartridge, depending on how much debris and swimmer load the water deals with. If the pressure climbs right back up within a week or two of a thorough cleaning, or the pleats look frayed and the bands are snapping, more cleanings are just a way to keep charging you. At that point we tell you it is time for new cartridges and quote the replacement straight.
Hard water makes this worse. The water in Riverside and Corona carries a lot of calcium, and that scale shortens cartridge life noticeably compared to softer-water areas. It is one reason a filter that lasted five years at your old house might need attention at year three here.
Either way, you get the real recommendation, not the one that generates the most service calls.
A loaded cartridge next to a clean one. The dirty filter was still "working" according to the homeowner.
Filter Cleaning Questions We Hear a Lot
How often does a cartridge filter need a full cleaning?
For most pools, every four to six months on top of routine monitoring. Heavy debris, lots of swimmers, or a recent algae problem shortens that. We watch your pressure gauge on weekly visits, so the filter gets cleaned when it actually needs it instead of on a guess.
Can you backwash a cartridge filter?
No. Backwashing only works on sand and DE filters, which have a multiport or push-pull valve built for it. Cartridges have to be pulled out and cleaned by hand. If someone tells you they backwashed your cartridge filter, ask what they actually did.
Why is my filter pressure low instead of high?
High pressure means a dirty filter. Low pressure means water is not reaching the filter in the first place. The usual suspects are a clogged pump basket, a full skimmer, or debris in the pump impeller. That is a flow problem, not a filter problem, and we check for it before touching the tank.
Have a different question? Call us, Monday through Friday, 7am to 5pm.
(951) 215-6142200+ Neighbors Can't Be Wrong.
Join hundreds of satisfied pool owners across Southern California.
“They cleaned my DE filter grids and the difference was immediate. Water went from hazy to crystal clear overnight. Should have called them months ago.”
“My filter pressure was through the roof. They came out, did a full teardown and deep clean, and now it runs like new. Thorough and professional.”
“I had no idea how dirty my cartridge filters were until they showed me. Night and day difference in water clarity after the cleaning. These guys know filters.”
“Filter pressure dropped 10 PSI after the cleaning. Water flow is stronger, skimmer pulls better, and the pool looks cleaner between visits. Huge difference.”
“They pulled apart the entire DE filter, hosed every grid, inspected the manifold, and reassembled it perfectly. Most thorough filter cleaning I have ever seen.”
“Switched to them after my last company just hosed the cartridges and called it done. These guys actually soak and deep clean. My water has never been this clear.”
“Had cloudy water for weeks and could not figure out why. Turns out my filter was completely clogged. One cleaning and the pool was sparkling the next morning.”
“They cleaned my DE filter grids and the difference was immediate. Water went from hazy to crystal clear overnight. Should have called them months ago.”
“My filter pressure was through the roof. They came out, did a full teardown and deep clean, and now it runs like new. Thorough and professional.”
“I had no idea how dirty my cartridge filters were until they showed me. Night and day difference in water clarity after the cleaning. These guys know filters.”
“Filter pressure dropped 10 PSI after the cleaning. Water flow is stronger, skimmer pulls better, and the pool looks cleaner between visits. Huge difference.”
“They pulled apart the entire DE filter, hosed every grid, inspected the manifold, and reassembled it perfectly. Most thorough filter cleaning I have ever seen.”
“Switched to them after my last company just hosed the cartridges and called it done. These guys actually soak and deep clean. My water has never been this clear.”
“Had cloudy water for weeks and could not figure out why. Turns out my filter was completely clogged. One cleaning and the pool was sparkling the next morning.”
Where We Offer Pool Filter Cleaning
We provide pool filter cleaning throughout our Inland Empire and Orange County service area:
Give us a call.
Speak directly with a pool care expert. Available Monday through Friday, 7am to 5pm PT.
(951) 215-6142Emergencies: 24/7 support for urgent issues
Get a free quote.
Fill out our simple form and get a personalized quote. No obligation, no pressure.
Get Your Free Quote