So – your swimming pool filter is having actually problems, and also you space seeking answers. Sit down grasshopper, have a cup that tea, and cost-free your mind native worry. Enlightenment is here.

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Pool filter trouble deserve to take many forms, and also not all issues with filtration room filter problems. Clogged or closed pool skimmers, pump or valves can all reason pool filter problems. Examine other tools for something that might be obstructing water flow – to and also from the swimming pool filter.

Here’s a list of common pool filter problems, and suggested remedies that you have the right to try.



When the pump is off, or the valve is collection to recirculate or drainpipe to waste, the filter pressure must be zero. If the filter push gauge reads zero or close to zero with the pump running and also the valve in filter or backwash mode, other is wrong. Offer the gauge face a flick – v your fingernail to view if it pops up. Check the gauge dial or face for warping, which deserve to prevent the dial from moving.

If you are certain that water is moving through the filter at a common rate, either the gauge has actually failed, or there is a clog in ~ the air bleeder assembly that the gauge screws into. Come check, closeup of the door the pump off and also remove the press gauge v pliers or a tiny wrench. Run a pole or tiny screwdriver down into the feet to clear out any type of clogs from debris that can block the press gauge or waiting relief assembly. $8 swimming pool filter gauges room cheap tools that will certainly fail in time; you may want to store a preventive gauge on hand.

If the water is not relocating through the filter at a regular rate, there is a clog or obstruction, before the swimming pool filter. It could be a clogged pump basket, clogged impeller, clogged pipeline or clogged skimmer. That could additionally be a close up door or broken valve prior to the pump. Or, the pump may have actually an waiting leak, and is illustration in more air 보다 water, which will additionally reduce the filter pressure (and filtration).


If your push is higher than normal, this usually indicates a dirty swimming pool filter. They say come backwash your filter (or clean your cartridges) as soon as the pressure rises 8 lbs over the clean, start-up pressure.

If your push is much higher than that, there might be a international substance in the filter (paper products, plastics, mulch, oils) that is really clogging it up. There could likewise be a close up door return valve or bypass valve after the filter, bring about the press to rise to very high levels. The filter and also the filter valve (multiport or slide) might have damaged internal components which have actually lodged themselves within of a pipeline or fitting.

Many pool filters operate in the range of 8-15 lbs the pressure, back I have actually seen them variety from 3 psi come 30 psi. If her filter pressure has jumped unexpectedly, come a greater than normal reading, there may be internal filter problems, or filter valve problems. Inspect the return next valves, or heater bypass come be sure they are open. Return-side pipes or valves after ~ the filter don’t generally clog through debris, but broken filter parts or valve parts can restrict the water flow after the filter; elevating the filter pressure.

Very high filter pressure have the right to be dangerous! Filter lids of seashells shell type filters have actually been recognized to blow off when the clamp band falls short under high pressure. Be sure that all pipes and also valves are open up after the filter, and if you see the push spike to 40 psi – shut off the filter immediately.


Most pool filters will certainly run for several weeks prior to the press rises 5-8 lbs greater on the pressure gauge. Very large filters deserve to take months, which is a nice feature for a swimming pool owner. Some filters can have problems however, that enable pool water to bypass the filter and also return come the swimming pool unfiltered. This can reason a swimming pool filter push to rise slowly, or take weeks to clean up adverse water conditions. In DE and sand filters, problems with the filter valve (multiport or slide), can reason water come bypass the filter. Internal problems (broken, absent or misaligned filter parts) inside a filter tank can cause water bypass on all swimming pool filter types, and also an oversized swimming pool pump have the right to push the dirt ideal through a filter.


If your filter press rises quickly after backwashing (within hrs or days), the filter media (sand, cartridge or grids) might be clogged through oils or minerals, requiring deep cleaning v a pool filter cleaner product made for your filter type, or instead of of the filter media. DE filter will likewise see a fast pressure increase when insufficient amounts of DE powder is used, or if the filter isn’t opened up up and the DE grids cleaned completely at least once every year. During an extremely poor water conditions, having actually to backwash daily or even more often have the right to be considered normal – yet with clean and also clear water, a well sized and well operating swimming pool filter should have a filter operation of 3-6 weeks, ideally.


As mentioned above, clamshell kind pressurized pool filters have the right to be dangerous. These space a common kind of filter tank style for cartridge and DE swimming pool filters v two halves and also a facility clamp to organize them together. If the clamp tape is leaking water, that is no making a for sure seal.

Shut turn off the pump and drain the filter tank by opened the air bleeder. Remove the filter clamp band and also the filter o-ring, aka belly band o-ring. Clean the o-ring with water and also a rag to remove any type of dirt and debris, and additionally clean the pickled in salt of the bottom tank half, wherein the o-ring sits. Inspect the o-ring for damage. If the o-ring is no much longer round, yet triangular in overcome section, or if it is cracked or has actually dry-rot, it need to be replaced.

Lubricate the filter o-ring with Teflon pool lube, and replace the top fifty percent of the filter tank. Certain the clamp band approximately both tank halves and also tighten down the nut every the way, till the springs are emotional (new layout clamps) or the two ends of the clamp room within 1/4″ of each various other on older types. Tapping the clamp tape lightly through a hefty wrench or mallet approximately the tank while tightening improves the seal.

In rarely cases, a tank may become deformed or warped, avoiding a good seal through the clamp band. In this case, call your dealer or the filter manufacturer for possible warranty coverage.


After backwashing, it is typical for a little amount the dust come blow into the pool. Using the multiport valve Rinse setup for 20 secs will resolve that problem. Because that sand filters, a small amount that silty dirt might pass v the filter all the time, and be considered normal. Making use of a filter cleaner or instead of the sand deserve to help, in enhancement to using a Clarifier. Just be certain that it’s no sand that is coming right into the pool. Hit it with a brush, and if that poofs up right into the water it is dust; if it just rolls around, it might be filter sand escaping with a damaged filter lateral.

DE filters have the right to lose DE powder into the pool (which looks choose sandy dust) through little tears in the fabric, a loosened filter net assembly, crack in the manifold or indigenous a missing air bleeder screen or standpipe o-ring. Cartridge filters also need to be mounted properly right into the tank to store water from bypassing the cartridge, or flowing around the cart. Or there might be feet in the fabric, native an oversized swimming pool pump or native chemicals, or native aggressive clean (with a press washer).

Finally, the trouble of dirt blowing ago into the pool could be resulted in by the swimming pool filter valve on sand or DE filters, bypassing some section of the water earlier to the pool unfiltered.


This is a valve problem, and not a filter problem. In a multiport valve, the spider gasket and rotor do a seal with each other to avoid water indigenous going come the backwash port as soon as the setting is various other than Backwash. If over there is a trickle or present of water continuous draining the end of the backwash line, open up up the multiport valve and inspect the gasket, which might be twisted, deformed or broken. If the valve manage is ‘floppy’, and also has small tension, you may likewise need to change the spring under the handle.

As a momentary measure, you can install a threaded plug or a valve ~ above the backwash heat to stop the water flow, but this need to not be permanent solution for 2 reasons. One, someone will forget to open up the valve throughout backwashing, which might be dangerous come the operator and damaging come the equipment. Secondly, if the valve gasket is no sealing increase the backwash port, it may not be sealing up the return port, which allows for water to bypass the pool filter – and also return come the swimming pool unfiltered.


Why is my swimming pool still cloudy? It might be many things, but let’s start with your water balance and also sanitation levels. As we have preached top top this beer-selection.com for countless years, for clean and clear swimming pool water, you require the trio of filtration, sanitation and also circulation. And you also need an excellent water balance (pH, Alkalinity and also Calcium).

If her sanitation, circulation and also water balance room spot top top – it’s time come look very closely at the pool filter. Is it running long sufficient each day? Are the pump and filter sized effectively for the pool and also for each other? Is over there a possibility that water is bypassing the filter sand, grids or cartridges, and also returning to the swimming pool unfiltered?

If your pool filter is a little bit undersized, or the media is tired, shot using a clarifier to aid coagulate rely particles. Friend can also use a flocculant, to settle suspended particles to the floor for vacuuming (to waste). In many cases where it takes weeks come clean-up negative water conditions, instead of the filter media (sand, cartridge or DE powder) can assist tremendously.


Trick question? Normally the pump is what provides the noise, and also while in procedure a pool filter is actually quiet. Loud pool pumps are generally caused by cavitation (starved because that water) or by bad internal motor bearings. A pool pump through an waiting leak can put many air right into the filter, which have the right to be a tiny noisy as the airy water is moved through the pool filter. If you have a continuous stream of air bubbles in the pool, or in the see with pump lid, watch for and patch any suction leaks (before the pump), with sealant.

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Another cheat question! The swimming pool filter is no electric, only the pump transforms on. If the pump won’t revolve on, it could be whole selection of points which are beyond the limit of this article. Look for this price in our upcoming beer-selection.com article Pool Pump Troubleshooting Guide.