Sump pumps tend to make a variety of sounds when they run. It’s important to know what these sounds mean since they can help you spot problems early. A weird noise may point to a minor issue or it could be a sign of a serious malfunction. By understanding these sounds before the next storm hits, you’ll be able to take action quickly and avoid costly water damage.
Key Takeaways
- Understanding normal vs. problematic sounds
- The 11 most common sump pump noises and what they mean
- Ignoring sounds can lead to costly repairs and flooding
- 3 quick fixes for noisy sump pumps
- Calling a pro can prevent major damage and expensive replacements
- Preventing noisy sump pumps
Normal vs. Problematic Sump Pump Sounds
Here’s a quick guide to help you spot problematic sounds:
– Normal: low hum, brief water whoosh
– Abnormal: loud, repetitive, sudden, or sharp noises
Regardless of the noise, if it gets worse over time, this means there’s a growing problem with the sump pump or drainage system. You should schedule a repair right away so the basement doesn’t flood the next time it storms.
The 11 Most Common Sump Pump Noises—and What They’re Telling You
Let’s look at 11 of the most common noises produced by sump pumps and what they mean. Some problems come with easy fixes, while others require professional help.
1. Gurgling
Sound: Like water swirling or burping
Cause: Poor discharge flow, check valve issues
A gurgling sump pump is a common indicator of poor water movement out of the output line. A broken or missing check valve might cause this.
A spring-loaded check valve, when installed in its place, usually fixes the issue. The pipe’s angle could also require adjusting for a more uniform water flow.
2. Grinding or Screeching
Sound: Metal on metal, high-pitched
Cause: Jammed impeller or dying motor
In most cases, a grinding sound indicates a major problem. Possible causes include a buildup of junk in the impeller or a failing motor.
You should shut off the power and check the impeller for built-up debris. You might also need to clean or replace damaged components. If the noise continues, you should call a plumber.
3. Constant Humming (No Water Movement)
Sound: Buzzing, low hum
Cause: Float switch stuck, motor jammed
If you hear a humming noise but don’t see any moving water, there could be a stuck float switch. The motor might also be locking up.
You can lift the float manually to see if the pump starts. If it doesn’t, you’ll need to turn off the power and call a plumber.
4. Banging or Thudding
Sound: Loud knock when pump shuts off
Cause: Water hammer, unbraced discharge pipe
The term “water hammer” describes the loud thump that occurs when the water flow abruptly stops. To lessen this noise, you can install a soft-close check valve or use support brackets to brace the discharge pipe.
5. Rattling
Sound: Pipe shaking or vibrating
Cause: Loose pipe fittings or pump misalignment
Rattling against adjacent walls or joists is a possible outcome of inadequately fastened discharge pipes. To lessen the impact of vibrations, you’ll need to secure any loose fittings and insulate pipes with rubber.
Pump misalignment can also cause rattling noises. This is why it’s so important to have the pump installed by a professional.
6. Clicking or Rapid Cycling
Sound: Click-click-click in rapid succession
Cause: Float switch bouncing or electrical issue
When a float switch bounces or makes intermittent contact, it’ll cause the pump to quickly cycle on and off. This puts extreme wear and tear on the unit and shortens its lifespan. You can test the float switch’s position by lifting it manually to see if it activates smoothly.
You may need to simply adjust its placement or untangle it to fix the noise issue. If the rapid cycling stems from an electrical issue, you’ll need help from a qualified professional. They can check the relay, which controls the electrical current to the pump.
7. Screaming or Whining
Sound: High-pitched whir or squeal
Cause: Motor bearing failure or overheating
Your pump’s motor is probably becoming hot if it’s making this sound. It could seize if not fixed quickly. A motor replacement might be the only permanent fix for this type of noise issue.
8. Sputtering or Splashing
Sound: Water hitting walls inside pit
Cause: Short discharge pipe or high water turbulence
The sound of splashing water often happens when the outlet pipe is too short. Extending the pipe or redirecting the outlet flow may help.
9. Sloshing
Sound: Sloppy, watery movement
Cause: Excess water entering pit rapidly
The sloshing of water will occur as the pump runs, especially during storms. This noise is very normal and shouldn’t be cause for concern. However, close monitoring during the storm will help you catch early warning signs of pump failure or overflow.
10. No Sound at All (And Water Isn’t Moving)
Sound: Silence
Cause: Dead motor, unplugged pump, or float failure
If you don’t hear the pump running during a storm and the pit is full of water, it means the device is not operating. This could be due to float failure or a dead motor.
Or maybe someone accidentally unplugged the unit without realizing it. An immediate inspection will help you identify the cause and prevent basement flooding.
11. Intermittent Beeping or Alarms
Sound: Digital alarm
Cause: Backup battery alert, high water sensor
Many sump pumps have built-in alarms to warn you of low battery or water issues. You must check the battery status and review the alarm log to pinpoint the source.
What Happens If You Ignore the Noise?
You should never ignore a sump pump that makes weird noises (or one that makes no noise at all during a storm). If you do, you’ll run into major problems, like:
- Burned-out motor: Overworked pumps overheat and permanently stop working.
- Backflow flooding: Water reverses direction, flooding your basement fast.
- Foundation water damage: Excess moisture weakens foundation, compromising your home’s structural integrity.
- Insurance problems: Flooding caused by mechanical breakdowns may disqualify you from coverage.
Quick DIY Fixes for Common Noises
Here are three quick fixes that readily resolve a lot of sump pump noise problems:
- Test the float switch: To check that the pump turns on and off correctly, manually lift the float switch. A properly working float switch will help mitigate constant humming and rapid clicking noises.
- Flush the discharge pipe: To unclog the discharge pipe of any accumulation or dirt, run water through it. The pump runs more quietly and with less effort when the pipe is clean.
- Inspect the impeller without removing the pump: Turn off the sump pump and visually inspect it for debris (e.g., dirt, leaves, small rocks). Remove all debris so it doesn’t jam the impeller blades. Clearing away any obstructions will stop grinding and screeching noises without having to do a full disassembly.
When to Call a Pro
Knowing when to call a professional is crucial to getting timely help to prevent sump pump problems. If any of the following applies to your situation, you need to book an appointment with a qualified plumber:
- 3+ years old and making new noises
- Noise + no water discharge = red alert
- DIY efforts don’t silence the issue
How to Prevent Noisy Sump Pump Problems
Here are four simple ways to reduce noise pollution from sump pumps:
- Clean pit every 3–6 months
- Test pump monthly during rainy seasons
- Add a battery backup and high-water alarm
- Use a lid or insulation to reduce operating noise
FAQs
Here are some helpful answers to frequently asked questions about sump pumps and noise pollution.
Is it normal for a sump pump to be loud?
While some noise is inevitable, disruptive or out-of-the-ordinary noises usually point to a major issue.
Why is my sump pump humming but not pumping?
This typically points to an issue with the motor or impeller. A thorough cleaning or realignment may fix the problem and stop the humming noise.
How much does it cost to fix a noisy sump pump?
Repairs normally cost anywhere from $100 to $300, depending on the issue. In some cases, it may make more sense to do a full replacement instead of a repair.
How long should a sump pump last?
The majority of sump pumps last 7 to 10 years with proper care and maintenance.
Need Sump Pump Repairs in Niceville, FL ?
When it comes to your sump pump, one strange noise might be no big deal—but it could also be the beginning of the end. Knowing what each sound means is vital to choosing the right solution. You might be able to simply tighten a pipe or you may need to call a plumber. The important thing is that you listen now so you don’t pay later.
Benjamin Franklin Plumbing offers expert sump pump services in Niceville, FL, and surrounding areas. We’re here to help with all of your plumbing needs, whether they be regular maintenance or unexpected emergencies. We’re always on time, or we’ll pay you $5 for every minute we’re late, up to $300.
Contact Benjamin Franklin Plumbing today to access top-tier sump pump services in Niceville.