How To Read Your Pool Filter Pressure Gauge

How To Read Your Pool Filter Pressure Gauge

Anthony Barnes

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If you’re anything like us, your pool is your pride and joy.

To keep it in tip-top condition, you’ll need to roll up your sleeves and get to work on various maintenance tasks – one of the most important is reading your pool filter pressure gauge.

Not sure what this is or what it means? Stick with us to learn more about your pool filter pressure gauge, including how to read it and knowing when to replace it. 

What Exactly Are Pool Filter Pressure Gauges: Explained 

A pool filter pressure gauge measures the volume of water that passes through your pool’s filter system per minute.

This number can be found by multiplying the size of the filter (in square feet) by the gallons of water filtered per hour (or cubic feet).

For example, if you have a 10-foot x 12-foot pool and your pool filter has an 8-inch diameter, you would multiply these two numbers to find out how many gallons of water are being filtered every hour.

The result will tell you how much pressure is being applied to your pool filter.

If you want to know how much pressure is actually being applied to your pool’s filter, you must divide the total amount of pressure by 60 seconds.

For example, if the total amount of pressure is 1,000 PSI and the period is 60 seconds, then the actual pressure applied to your pool’s filters is 1,000/60 16.7 PSI.

The higher the PSI value, the better the quality of your pool water.

However, too high of a PSI can damage your pool’s pump and other pool equipment parts.

What Should The Reading Of Your Pool Filter Pressure Gauge Be? 

How To Read Your Pool Filter Pressure Gauge

Your pool filter pressure gauge should always be between 30 and 50 PSI.

If you see any readings above 50 PSI, there could be several reasons why.

One reason may be that your pool filter needs to be replaced. Another reason could be that your pool’s skimmer basket is clogged with debris.

If you notice that your pool filter pressure gauge is consistently over 50 PSI, it may be time for you to replace your pool filter. 

What Factors Affect Your Pool Filter Pressure Gauge Reading?

There are a few factors that affect your pool filter pressure gauge reading. These include but are not limited to:

The age of your pool filter. Older pools require more frequent cleaning than newer models. As a result, they tend to produce less water flow.

• The type of filter used in your pool. Some types of filters are designed to clean water faster than others.

• How often you use your pool. If you only use your pool once or twice a week, then you won’t need as large of a filter as someone who uses their pool multiple times each day.

• The amount of water flowing through your pool. A larger volume of water will increase the amount of pressure being applied to your pool filters. 

When Should You Replace Your Pool Filter Pressure Gauge? 

You should replace your pool filter pressure gauge at least once a year, but it’s recommended that you replace your pool filter pressure gauges every three months.

It’s also recommended that you replace your filter after each season so that you don’t risk damaging your pool pump.

However, if you notice that your pool’s filter is not performing as well as it used to, you may want to consider replacing your pool filter sooner than that.

This way, you won’t have to worry about your pool pump failing because of excessive pressure.

What Happens If Your Pool Pressure Is Too High? 

If your pool filter pressure gauge reading is too high, there could be several possible causes.

For example, one cause might be that your pool filter cartridge is damaged. Another possibility is that your pool filter is not properly installed.

A high-pressure reading can cause a number of issues, including :

• Damage to your pool pump

• Damage to your plumbing lines

• A loss of power to your pool pump

To avoid these problems, make sure that your pool filter pressure reading is below 50 PSI.

A high-pressure reading is considered anything above this level.

To lower your pool filter pressure gauge level, you may need to replace your pool filter cartridge.

When Should You Change A Pool Filter Cartridge?

The lifespan of a pool filter cartridge depends on how much water flows through your pool.

You’ll need to change your pool filter cartridge when it becomes worn out.

Your pool filter cartridge will show its wear when its performance decreases.

For example, if you notice that the water flow rate has decreased by half, you’ll know that it’s time to replace your pool filter cartridges.

Your pool filter cartridge will also begin to show signs of wear and tear if you leave it in place for an extended period of time, but some are designed to last longer than others.

What Happens If Your Pressure Is Reading Too Low? 

How To Read Your Pool Filter Pressure Gauge

A low pool filter pressure reading can be caused by several factors, including :

• Dirty or clogged pool filter cartridges

• Overly large amounts of dirt in the pool

• An improperly sized pool filter

To prevent a low pool filter pressure reading, you need to ensure that your pool filter is working correctly.

A low-pressure reading can cause several issues, including:

  • Damage to your pool pump
  • Damage to your pool plumbing system
  • Loss of power to your pool pumps

A low-pressure reading is considered anything below 50 PSI. If your pressure reading is too low, you’ll need to take action immediately.

To increase your pressure reading, you may need to add additional water to your pool.

Pool Filter Air Pressure Release Valve: Explained 

A pool filter air pressure release valve relieves excess pressure from your pool filter.

This helps prevent damage to your pool’s filter and your pool pump.

There are different types of pool filter air pressure release valves available today. Some of them are manual, while others are automatic.

Manual Pool Filter Air Pressure Release Valves: Manual pool filter air pressure release valves are typically made out of plastic. They’re easy to install, and they require no maintenance.

Automatic Pool Filter Air Pressure Release Valve (AFAPRV): Automatic pool filter air pressure release valves are typically made out of metal. They’re more expensive than their manual counterparts, but they last longer and require less maintenance.

When Should You Install A Pool Filter Air Pressure Release Valve? 

The best time to install a pool filter air pressure release valve is when you first install your pool filters.

Installing a pool filter air pressure relief valve before installing your pool filters will help protect your pool pumps and other components from being damaged.

You should also check your pool filter air pressure release values once every year to ensure that they’re still functioning correctly.

How To Replace Your Pool Filter Pressure Gauge 

Is it time to replace your pool filter pressure gauge? Let’s look at a simple way to get the job done.

Step 1 – Open Up The Back Of Your Pool Filter Pressure Gauges

The first step when replacing your pool filter pressure gauge involves opening up the back of your pool filter pressure gauge.

Open up the back of your filter pressure gauge using one of the following methods :

• Unscrew the bottom screws holding the back panel together

• Pry off the back panel with a screwdriver

• Use a pry bar

Step 2 – Remove Your Old Pool Filter Pressure Gauge

Once you’ve opened up the back of your old pool filter pressure gauge, remove it using one of the following techniques :

• Pull the old pool filter pressure gauge off of its mounting bracket

• Pry off the old pool filter pressure gauges’ mounting bracket

• Use a prying tool

Step 3 – Install New Pool Filter Pressure Gauge On The Mounting Bracket

After removing your old pool filter pressure gauge, place it on top of your new pool filter pressure gauge.

Then, slide the new pool filter pressure gauge into position on the back of your pool’s filter cartridge.

Step 4 – Close Up The Back Of Your New Pool Filter Pressure Gauges 

When installing your new pool filter pressure gauges, close up the back of the gauges to ensure water doesn’t leak through.

The Bottom Line 

Reading your pool filter’s pressure gauge is an essential maintenance task, but thankfully, it doesn’t have to be a difficult one.

We hope this article has helped you learn how to read your pressure gauge correctly and given you the knowledge to keep your pool running smoothly!

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By Anthony Barnes

Anthony Barnes is the founder of Water Heater Hub and a second-generation plumber by profession. Before developing Water Heater Hub, Anthony Barnes was a full-time plumber, and he has undertaken a wide variety of projects over the decades. As a second-generation plumber, it was easy for Anthony to get used to the technicalities of all from a tender age