Why Is There No Pressure In My Pool Filter?

Maintaining a pool in your home can be a bit of a hassle at times. You have to clean it all the time, do constant check-ups, and spend quite a bit of money on repairs. It can be frustrating the moment that you find something is not working properly.

Why is there no pressure in my pool filter? The filter in your pool system might be due to clogging, leaks, or broken valves. If your filter has no pressure, it is not the end of the world. Just proceed with the troubleshooting steps in this article.

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This article will help you figure out what the problem is with your pool filter. You will learn what the term “low pressure” means in pool terms and what causes this. We will also provide some troubleshooting tips that you can do to fix your pool filter.

Explanation Of Low Or No Pressure

When your pool has “low pressure,” your system has a low PSI reading and weak jets. PSI refers to the measurement of your pool system’s pressure, and it stands for pounds per square inch. You can see the PSI reading on your pool filter’s pressure gauge.

Pool Jets

Pool jets have a vital purpose aside from in-pool massages. The jets are essential to your pool’s filtration system. These help with the circulation of the pool water, and they also block debris from entering and damaging your filters.

If there is no pressure in your pool filter, you will see that your pool jets are much weaker. You might also see air bubbles coming out from the jets. When this happens, it is a telltale sign of low or no pressure in your pool system.

Pressure Reading

During your routine pool check-ups, you should pay close attention to the pressure gauge. The typical pressure reading should be around 10 to 25 pounds per square inch (PSI).

It may vary depending on the pool system you have, though. To determine the normal reading for your pool, take note of the pressure after cleaning the filter thoroughly. If you recall the pressure reading from when the pool system was first installed, that would be even more accurate.

Causes Of No Pressure In Filter

If you noticed there is no pressure in your pool filter, the next thing is to find the root cause. Check out below at some of the most common causes of this issue:

Broken Pressure Gauge

The pressure gauge of your filter should be zero when the pump is turned off. However, if the pump is on and running, but the gauge is still at zero, something might be wrong.

Tap on your pressure gauge to see if it is working. If the dial still is not moving, you might have a malfunctioning or broken pressure gauge. Your pool filter might be completely fine, and the problem was just with the gauge itself.

Clog In The Air Bleeder Assembly

The air bleeder assembly attached to the pressure gauge. When there is no blockage, water should be running through the filter normally. There might be a clog in the air bleeder assembly if there is little or no water passing through.

A clog in the air bleeder assembly could mean other parts of the pool system is clogged as well. Check the skimmer, pipe, pump basket, and impeller to see if there is any debris blocking the water flow. The pool strainer may also be obstructed.

Closed Valves

If the pressure gauge is working correctly and there is no clogging, the problem might be the valves. Either they are broken and need repairs, or they might just be closed and preventing water from flowing. Find the closed valves, open them, and see if the situation improves.

Troubleshooting Tips

This problem is bound to happen sooner or later, even if you have the best, most expensive pool system. You can solve this with basic troubleshooting if you find that you have no pressure in your pool filter.

Try to get rid of the pressure issue with by taking the following steps:

Removing Obstructions

Obstructions are the most common reason for weak water flow, so you have to get this out of the way. Doing this should not take too long.

The first area you may check is the air bleeder assembly that is screwed into the pressure gauge. Clear this of any dirt, sand, and other debris. If the problem persists, there might be clogs that you have to tend to in other places.

A clogged filter is also a probable cause. There are two different types of pool filters ‒ sand filters and cartridge filters. If you have a sand filter, try backwashing to unclog it. For cartridge filters, you either have to clean or replace the cartridge.

Take a look at the skimmer and drain pipes to see if there is clogging there too. Do your best to clean them thoroughly if there are obstructions. If you are unable to unclog them successfully, you may need to buy additional tools.

As an alternative, calling a professional to help would save you the headache of doing it yourself.

Get New Equipment

If you experience this problem often, it might be time to get an upgrade finally. If the damage is severe and your pool parts are several years old, necessary repairs will not be effective.

Upgrading the parts of your system will have your pool working good as new. With a new system installed, it will be easier to prevent damages. If you were a bit careless before, you could start cleaning and doing maintenance work on your pool more often.


Dealing with these problems is something that you only have to put up with if you want your pool. Issues with pool filters are quite simple, and you do not have to be an expert to find a solution. Just remember that the main cause of low or no pressure in the filter is usually clogging or obstruction.

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