How to Remove Pool Pump Impeller - Globo Pool
Pool Care Pool Maintenance

How to Remove Pool Pump Impeller

Even if you bought the highest quality water pump, it would need maintenance; it will eventually break down and require some replacement parts. An Impeller, the heart of your pool pump assembly, requires checkup time and then to ensure it functions appropriately always to push the water as needed. After some time, the impeller requires to be checked to see if it needs replacement or unclogging. The process requires special care.

Unlike pool plumbing or pool skimmer, a pool pump impeller is located inside the pool pump itself, a place that requires time and patience to reach and remove. I believe you’re here to know how to remove pool pump impeller. Right? Well, this post will give you precisely what you need.

What is the purpose of the impeller?

As I mentioned above, an impeller is the heart of a pool pump assembly. What does it do? Well, the component is designed to rotate and create centrifugal force that transfers energy from the motor. The effect created adds kinetic energy to the flowing water allowing it to go for a further distance. In simple terms, it’s the rotating component inside a pool pump that pushes water through the pool’s plumbing system.

What happens when the impeller goes bad?

Before you decide to remove the pool pump impeller, you need to have a reason for it, with the main reason being it is faulty. But how did you know it’s defective. An impeller goes bad if it gets clogged or it’s worn out.

If the impeller is in perfect condition, the water pressure will hold steady unless the filters are clogged with dirt and debris. That’s after a week or so after the last backwashing. If your pool water pressure drops quickly after you cleaned the filters, there may be a problem with the pump impeller.

And if that happens, the pump won’t be able to pump cooling water through the engine, causing it to overheat. The impeller might also be worn out where the pump stops the pump and instead use the electricity without creating any pressure.

How long does a pool pump impeller last?

A right quality pump has durable components, including the impeller. However, as a moving part of the water pump, it will need replacement at one time. The lifespan of a good quality impeller is between 8 to 15 years, depending on the pump’s usage. That’s is a reasonable period for the pump to have paid for itself before needing repair or replacement.

How Do You Remove Pool Pump Impeller

When it comes to removing the pool pump impeller, you must understand that this is a simple process that needs care. If you want to maintain a clean pool, it’s best to ensure your pool circulation and filtration system works perfectly. If the pool pump stops working, it becomes tough and nearly impossible to keep your pool clean. And since it might be a simple problem with the impeller, learning how to remove pool pump impeller can be an excellent move.

What do you need?

  • Lifting device or assembly aid arm
  • Corresponding wrench
  • pair of pliers
  • A Screwdriver
  • New impeller (if a replacement is needed)


Removing the impeller

You need first to turn off and unplug the pool pump. Turning off the pump power alone won’t be enough as many models use self-timer and can turn back on unexpectedly. For that, you should unplug it to avoid electric shock.

The next step is to disconnect the pump from the pool assembly and the filter housing. That means you need to disconnect the central drain hoses plus the skimmer. If you’ve got a valve, shut it off to prevent the water from flowing back to the filter.

If you don’t, you can disconnect the return hose from the filter. That prevents pool water from flowing through the filter back to the pump when the assembly is disconnected from the filter housing.

It’s time to get your hand dirty; remove all the bolts joining the water discharge housing to the pump assembly. It’s located in front of the motor and at the back of the pump basket. Once you remove the bolts, you will have access to the impeller.

Once you’re done loosening the discharge housing, next is to loosen and remove the bolts securing the motor housing back. Why? Even though you reach the impeller from the discharge housing, you still need to access a nut placed at its back, residing in the motor housing to remove it. It’s this nut holding the screw affixing the impeller to the motor.

Once the motor housing, use a pair of pliers to hold the nut. The pliers help secure the nut in place and allow you to unscrew the front of the impeller utilizing a screwdriver. Once the screw is out, you can pull the impeller out.

Replacing the impeller

If the impeller is too gone, you will have to replace it with a new one. How do you do it? Since you have already opened up the system and remove the worn-out impeller, the steps continue.

Use the screwdriver to screen in the new impeller onto the pump shaft. Ensure there is the 1/8-inch clearance between the pump impeller and the assembly suction-side casing.

Tighten the nut holding the impeller on the other side of the discharge housing. Next, secure the discharge housing in place. You can lock and seal the threaded fasteners to ensure there is no loosening.

Now you can reconnect the suction plus discharge hoses. What’s more, reinsert the necessary drain plug, plug in the pump, and restore it to the pump.

Final Verdict!

You may need to remove your pool pump impeller for one reason or the other. Whichever the reason, the process needs to be taken slow and carefully, unless you don’t care if the pump won’t operate again. If you’re planning to use the pump after checking or replacing the impeller, you may want to use the right removal steps to prevent breaking things. Everything in this post will help you with how to remove pool pump impeller.

About the author

Sharif Miah

Hi! I'm Sharif, the founder of Globo Pool® and I have been working in the pool & hot tub industry for the last few years. I love to share my experiences with people & hope you are enjoying my information and lessons!

Leave a Comment