A pool is a significant investment and a source of enjoyment for many homeowners in the Tampa Bay Area. However, nothing can be more frustrating than a loud pool pump disrupting the peace. A noisy pool pump not only indicates that something may be wrong, but it can also diminish the tranquility of your outdoor space.
Let’s explore the common reasons why your pool pump might be running loudly and provide step-by-step guidance on how to address these issues.
Tools You’ll Need Before Troubleshooting Your Pool Pump
| Basic Hand Tools | ✔️ Phillips screwdriver ✔️ Flathead screwdriver ✔️ Socket wrench set (¼” and ⅜” sizes usually enough) ✔️ Adjustable wrench ✔️ Needle-nose pliers Why: Opening the pump housing, removing the motor, checking the impeller, and tightening fittings all require basic hand tools. |
| Lubricants & Seal Helpers | ✔️ Silicone pool-safe O-ring lube ✔️ Replacement O-rings or gaskets (lid O-ring + housing gasket) Why: Many pump issues come from air leaks caused by dry, cracked, or flattened O-rings. |
| Water-Handling Tools | ✔️ A small bucket ✔️ Towels ✔️ Shop-vac (optional but very helpful) Why: You’ll be moving water, draining baskets, and preventing spills. |
| Electrical Tools (Optional but Helpful) | ✔️ Non-contact voltage tester ✔️ Multimeter Why: If your pump won’t turn on, checking if power is reaching the motor prevents unnecessary part replacements. |
| Cleaning Tools | ✔️ Garden hose with spray nozzle ✔️ Soft brush ✔️ Straightened wire coat hanger or impeller pick Why: Impellers often fill with debris like leaves, pebbles, hair, or seal pieces. You’ll need something to pull that junk out. |
| Owner’s Manual or Model Number | Why: Every pump opens a little differently. Have the pump model number handy (on the motor plate or pump housing). |
Tips Before You Start Troubleshooting:
1. ALWAYS Turn Off Power at the Breaker
Pool pumps are 240V or 120V.
Breaking the circuit is mandatory before you touch anything.
2. Close the Pool Valves
If your system has valves on the suction and return:
- Turn them to closed before opening the pump.
This prevents water from rushing out when you take the pump apart.
3. Release Pump Pressure
Turn the filter air relief valve (usually on the top of the filter) to release pressure.
Never open a pump or filter under pressure.
4. Let the Pump Cool Down
If the pump overheated or shut off:
- Wait 15–20 minutes before working on it.
The motor casing can get VERY hot.
5. Work in Good Weather
Avoid troubleshooting during:
- Heavy rain
- Thunderstorms
- When standing water is around the equipment
Safety first—electricity and water don’t mix.
6. Take Pictures as You Go
Especially when disconnecting:
- Wiring
- Bolts
- Diffuser position
- Seal plate orientation
Photos make reassembly MUCH easier.
7. Label Your Valves (Optional but smart)
Use tape or a marker to label:
- Skimmer
- Main drain
- Returns
This helps you remember the correct positions after troubleshooting.
8. Expect a Little Water
Even with valves closed and system drained:
- A bit of water WILL come out when opening the pump housing.
That’s normal.
9. Don’t Force Anything
If something doesn’t want to turn, loosen, or unthread:
- Stop
- Re-check for hidden screws or clips
Pool pump parts are plastic and crack easily.
10. Have Replacement Seals Ready (If Digging Into the Motor)
If you’re checking the impeller or seal plate, it’s smart to have a pump seal kit ready so you can reassemble without leaks.
Common Causes of a Loud Pool Pump
| Cavitation | Cavitation occurs when air bubbles form inside the pump, leading to a loud banging or rumbling noise. This can happen if the water flow into the pump is restricted or if the pump is oversized for the pool system. In Tampa Bay, where debris and leaves from tropical plants are common, a blockage in the pump can often lead to cavitation. |
| Loose Pump Parts | Vibrations can loosen screws and other components in your pool pump over time. A rattling or clanking noise might indicate that some parts need tightening or replacing. |
| Clogged Impeller* | The impeller is responsible for moving water through the pump. If it becomes clogged with debris, it can lead to an unbalanced operation, causing the pump to vibrate and produce a loud noise. Pools in the Tampa Bay area, surrounded by lush vegetation, are particularly susceptible to this issue. |
| Improper Pump Installation | If the pool pump wasn’t installed correctly, it could cause excessive vibrations and noise. Improper alignment or failure to secure the pump to its base can result in loud operation. |
| Old or Failing Motor | Pool pumps, like all mechanical devices, have a finite lifespan. If your pump is aging, the motor could be nearing the end of its functionality, often resulting in unusual noises that signal the need for a replacement. In most cases, a loud screeching sound is likely due to worn bearings. |
| High Flow Rate | Sometimes, a pump that is too powerful for your pool’s plumbing system can lead to noise issues. A high flow rate can cause turbulence in the water, leading to loud sounds emanating from the pump. |
Steps to Address a Loud Pool Pump*
Once you’ve identified the potential cause of the noise, you can take steps to address it. Below are the actions you can take to resolve each of the issues mentioned.
1. Check for Cavitation
To prevent cavitation:
- Ensure the skimmer and pump baskets are clean. In Tampa Bay, this is especially important due to the area’s plant life.
- Check the pump’s water level to ensure it’s not too low, as this can introduce air into the system.
- Inspect the suction lines for blockages that could restrict water flow.
- Evaluate the pump size relative to your pool system. If the pump is too large, you may need to consult with a pool professional about replacing it with one that matches your system’s needs.
2. Tighten Loose Pump Parts
If you hear rattling or clanking:
- Turn off the pump and inspect it for loose screws or parts.
- Tighten all screws and fittings securely.
- Replace any worn or damaged components that might be contributing to the noise.
3. Clean the Impeller
To clean a clogged impeller:
- Turn off the pump and disconnect the power.
- Open the pump housing to access the impeller.
- Remove debris such as leaves, twigs, or other obstructions.
- Reassemble the pump and test for noise.
Regular maintenance, including cleaning the impeller, is crucial for Tampa Bay pools, where debris can accumulate quickly.
4. Check Installation
If you suspect the installation might be incorrect:
- Inspect the motor and bolts to ensure everything is securely tightened and properly aligned.
- Consider placing a vibration pad beneath the pump to minimize noise.
5. Consider Motor Replacement
If your motor is old or failing:
- Assess the age of the motor. If it’s nearing the end of its expected lifespan (typically 2-4 years), it might be time for a replacement.
- Consult with a pool professional to select a new motor or pump that suits your pool’s needs and complies with energy efficiency standards.
6. Adjust Flow Rate
If a high flow rate is causing noise:
- Evaluate the pump’s speed settings. If you have a variable-speed pump, reducing the speed may alleviate the noise.
- Consider downsizing the pump if it’s too powerful for your pool system. A pool professional can help determine the appropriate pump size.
How to Find the Impeller on Your Pool Pump
The impeller is located inside the pump housing, directly behind the pump basket and inside the volute (wet end). To access it, you’ll need to remove the pump housing cover and diffuser.
What You’ll Need:
- Screwdriver or socket wrench (depends on your pump model)
- Towels
- A flat surface to place parts
Step-by-Step Instructions
1. Turn Off All Power
Safety first!
Turn off the pool pump at:
- The pump switch
- The circuit breaker
This protects you from electrical hazards.
2. Close the Valves
If your system has valves on the suction and return lines:
- Close them to prevent the pump from flooding when you open it.
3. Remove the Pump Lid
- Unscrew the pump lid (usually a large ring or two side clamps).
- Take out the pump basket and set it aside.
The impeller is deeper inside, behind a second internal cover.
4. Separate the Pump Housing From the Motor
This is the main step.
On the back half of the pump, where the motor meets the wet end:
- Look for 4–6 bolts around the perimeter.
- Remove these bolts.
Once undone:
- Pull the motor straight back, away from the pump housing.
This will expose the diffuser or seal plate.
5. Remove the Diffuser
Inside, you’ll see a round plastic cover with a few screws holding it in place—this is the diffuser.
- Remove the diffuser screws.
- Slide the diffuser off.
Now you’ll see the impeller—a round, finned piece threaded onto the motor shaft.
6. Identify the Impeller
The impeller looks like:
- A disk with curved vanes
- Usually black or tan plastic
- Attached to the end of the motor shaft
This is the part that spins to move water.
Tips
If you’re replacing the impeller, you must hold the back of the motor shaft while unscrewing the impeller (usually reverse-thread on some pumps).
Sand, debris, or broken seal pieces inside the impeller are common causes of low flow.
When to Contact a Pool Professional
If you’ve gone through the steps above and your pool pump is still running loud, or if you’re unsure about handling the repairs yourself, it’s time to contact a local pool repair company. In the Tampa Bay area, a trusted name for pool repairs is JJB Pools & Spas.
JJB Pools & Spas specializes in diagnosing and repairing pool pump issues, ensuring your pool operates quietly and efficiently. They can provide expert advice on whether your pump needs a simple repair or a total replacement. Their team understands the unique challenges of maintaining pools in the Tampa, FL, climate and can offer solutions tailored to your specific needs.
*Disclaimer:
Attempting to troubleshoot or repair your pool pump can involve working with electrical components and moving parts. To avoid injury, always turn off the power to your pool pump at the circuit breaker before beginning any inspection or maintenance. If you are unfamiliar with pool equipment or uncomfortable with performing repairs, it is highly recommended to contact a professional. Incorrect handling or repairs can lead to further damage to the pump or pose safety risks. Always prioritize your safety and consult with a certified pool technician when in doubt.
Picture Source: JJB Pools & Spas
JJB Pools & Spas provides expert pool maintenance, pool repair, pool resurfacing, pebble surfacing, and pool renovation across Tampa Bay — serving Largo, Palm Harbor, Dunedin, Belleair, South Tampa, Hyde Park, Palma Ceia, St. Pete Beach, Westchase, Odessa, Nine Eagles, Davis Islands & Clearwater Beach, and surrounding areas. We use only the best pool and spa industry brands, including Wet Edge Technologies, Primera Stone, Prism Matrix, Luna Quartz, Signature Matrix, and Aquabella Tile. JJB Pools is also a platinum warranty station for all Hayward brand equipment, and an expert in Variable Speed Pumps and energy-efficient pool heating. Call for a free estimate! (727) 412-4373