A sump pump is a mechanical device to prevent water damage to basements, crawl spaces, and garages. They work by pumping out excess water from the lowest part of your home’s foundation, and the extraction process may cause them to make some sound.
While little noise is normal, it is alarming if you hear any unusual or humming noise. If persistently ignored, it can also be fatal for your sump pump.
This article explains what causes a humming noise in your sump pump and how to fix it.
Causes & Solutions of Humming Noise
Here are the prominent causes of the humming noise by the sump pump and their respective solution:
1. Clogging in the Vent Hole
A vent hole is a small opening near the basin’s bottom. Air enters the basin via the vent hole, allowing the pump to work correctly. But if the vent hole becomes blocked, it prevents the pump from pushing air out of the basin. As a result, the pump fills with air, creating an airlock. It also leads to a humming noise when the pump is working.
Solution: To fix that, open the valve on the side of the basin and let the air escape. Then close the valve and turn the pump on again.
2. Damaged Impeller
The main job of an impeller is to pump out the water from the system. A faulty impeller does not allow the pump to perform its function, leading to a humming noise. It indicates that the pool sump pump is running but cannot push out the water. Check for any damage, including its blade.
Solution: Consider repairing the impeller. You may also choose to replace it if it is too old. An impeller is a significant part of your sump pump that must function correctly for effective sump pump functioning.
3. Clogged weeping hole
As we know, the weeping hole is responsible for preventing airlocks, but what will happen if it is clogged? As the pump’s chamber gets filled with air, the pump will not be able to suck out water due to the airlock. Technically, the sump pump will run, but it will pump out water instead of air leading to a humming sound.
Solution: Clean the weeping hole for smooth airflow.
4. Frozen Pipes
When the weather changes and the temperature drops, freezing pipes are a common issue. Due to ice crystallization, the pump cannot push out the water. It leads to a humming sound and should be treated in time. Else it may lead to pump motor burnout.
Solution: Use a heater near the pipelines to melt the ice. Beware of the controlled temperature if you are using plastic pipes.
5. Issues with check valve
The main job of check valves is to allow water to flow uni-direction. It prevents the water from expelling out of the discharge pipe. If the check valve fails, the sump pump will pump the same water batch back and forth.
Hence, a failing check valve should be replaced in time. Otherwise, the pump will keep throwing the same water from the basin. Due to excessive pressure on the pump motor, the pump’s lifespan also gets reduced significantly.
Solution: Replace the check valve immediately.
Other causes that lead to unusual loud noises from the sump pump
6. Lack of Lubrication
Proper lubrication of the lines and pump motor avoids friction to its moving parts leading to pump noises. It also leads to faster wear out of these parts and loud grinding noises. Compared to cast iron, PVC pipes make more noise. Consider upgrading if you have plastic pipes in your sump pump. Cast iron pipes are affordable and come with higher durability than plastic pipes.
Solution: Lubricate all the sump pump parts with a high-quality lubricating oil to reduce friction and grinding noise.
7. Spring is missing from the Check Valve
One of the most common problems with sump pumps is that they don’t have a spring-loaded check valve installed. These valves keep the water in while the pump runs, preventing the water from backing up into the house. Without this valve, the water backs up into the home and creates a lot of noise.
Solution: You can solve this problem by installing a spring-loaded check valve.
8. Longer sump pump runs.
If you notice your sump pump runs more frequently than usual, it may result in early wearing off the pump. If the moisture in your basement is less than expected, but your sump pump is working hard, it indicates something is wrong with the pump.
Solution: Replace the existing pump with the best sump pumps to keep your basement flood-free
Sump pump noises are more common if it frequently runs to drain out the water.
What are the other signs of a failing sump pump?
Besides loud noises like humming and grinding, a sump pump emitting a burnout smell during operation is a significant sign that it may be encountering some issues. If you hear any unusual noise or sense any such issue, it is crucial to figure out why. For example, a consistent grinding noise indicated a problem with the impeller. Along with water, some debris is collected in the basin and reaches the impeller.
Solution: Clean the impeller periodically to avoid any clogging.
How To Fix the Humming Noise in Pool Pump?
As we have already discussed the various causes of humming noise in pool pumps, it’s time to fix it in 3 easy steps:
1. Checking the Capacitor
The main job of a pool pump capacitor is to switch the pump to the secondary Power source for the pump motor. Without the capacitor’s nudge, the pool pulp will not start causing a dread-humming sound.
Call a professional to address the problem and provide a feasible solution.
2. Clean the Pump Basket
All the debris from the groundwater accumulates in the pump basket that clogs the impeller. It affects the filtration rate and water quality of your sump pump. It will lead to tripping the circuit breaker or even burning the motor. An automatic skimmer is a viable solution to catch the rocks, leaves, and debris, but it does not see everything coming it’s way.
It would help if you cleaned the pump basket periodically to avoid clogging issues:
- Turn off the filter and pump
- Gently open the pool basket lid
- Check the worn bearings and debris.
- Now remove the basket and clean it gently using a garden hose
- Place the basket back after cleaning
- Replace the lid and turn on the power.
Understanding the different types of pool pump noises is essential before fixing them. The solutions mentioned above will help you eliminate the annoying sounds caused due to pool