Does A Sump Pump Need an Air Hole in It?

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Does A Sump Pump Need an Air Hole in It?

A sump pump is a device you install in an underground sump or pit, typically in the basement of a building, to draw up and discharge water away from the building.

It has two main uses: To pump out surface water, prevent it from entering building foundations, and remove excess groundwater or condensation.

Yes, A sump pump needs an air hole to function correctly. When a sump pump works, water pressure pushes the liquid away from the house. If there is no air hole in the sump pump basin, that water pressure will also push air away from the house. This can cause your sump pump to stop working.

However, we don’t recommend you put an air hole anywhere but in a plastic pail with a rubber mallet to avoid unwanted leaks.

A really simple way to see whether your sump pump needs an air hole is by holding up a water leveler. Here are some purposes of air holes on a sump pump:

1. To prevent an airlock

An air lock occurs when the pump does not get enough air to work at full capacity. You need to keep an air hole for your pump.

2. Prevents pump damage

An air hole allows proper water flow and prevents damage to the pump.

3. Maintains pump prime

Pump prime occurs when a pump does not have enough water to be powered. The pump needs an air hole for it to maintain its prime.

4. Allows proper drainage

An air hole allows proper water drainage at your home, so you are sure the sump pump is working properly.

What Is the Purpose Of A Vent Hole In A Sump Pump?

Preventing AirlocksInstalled on the discharge side of the pump to equalize air pressure.  This prevents airlocks and helps keep water flowing.
Allowing Heat From The Motor To EscapeInstalled at the discharge side of the pump to discharge heat generated by the motor inside.

This helps release heat from the motor and not the sump pump itself, thereby reducing damage from overheating.
Preventing Suction Water From “Back-Flooding” Your SumpInstalled at the pump’s suction side to avoid suction water from entering the sump. The vent hole or pipe releases suction water from the pit in an open space.

Having a separate discharge line for venting and discharge eliminates a source of standing water in your pit.
Preventing A Pump from OverheatingInstalled at the suction side of the pump. It allows water to pass out at the same rate it is entering.

This equalizes pressure and prevents excessive suction of air into the sump pump.
Preventing A Vacuum EffectInstalled above or below a water level to release gas bubbles trapped inside your pipes or tank by creating an air pocket, preventing any vacuum effect from occurring inside your system.

Where Do You Drill an Airlock Hole In A Sump Pump?

Where to DrillExplanation
Between the discharge and check valve-Make sure that the discharge pipe is on top of the check valve.
-Mark a vertical line at the level of your hand and drill there.
Directly above the connection fitting at the pump base.-Ensure you have enough pipe from the sump to the pump base. Mark a vertical line at the level of your hand, and drill there.

-This is the hole where you will connect the exhaust hose to the pump bottom.
Directly above the sump connection fitting at the pump base.-Ensure you have enough pipe from the sump to the pump base. Mark a vertical line at the level of your hand, and drill there.

-This is the hole where you will connect the suction hose to the pump bottom.
In the suction pipe below any check valve or strainer inlet  -Make sure your suction pipe is clear of debris build-up and runs straight into the sump  
At the intake connection fitting on the pump-Ensure you have enough pipe from the suction hose on the pump top up to the inlet fitting below the pump top.

-Mark a vertical line at the level of your hand, and drill there.

Do All Sump Pumps Need A Check Valve?

Yes, Most sump pumps should have a check valve. The check valve is a safety precaution to maintain the pump’s performance. Without it, water could travel back into the sump pit and cause possible flooding.

Other reasons:

1. To prevent backflow

A check valve will prevent the sucking of water into the house.

2. To maintain pump performance

You need a check valve to get the maximum pumping performance from your sump pump.

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3. To prolong the life of your pump

A check valve will allow a constant water flow to the pump. This will help prolong the pump’s life because it won’t be on as long and won’t get damaged from overuse.

4. For safety reasons

A check valve will prevent the sump pump from pumping air instead of water. It will also protect both your home and your sump pump.

Many sump pumps have a float system that you may need to adjust constantly because of some water infiltration.

5. For convenience

A check valve will allow easy sump pump maintenance. Switching the drain hose allows you to easily switch from one sump pit to another. There is no need to remove the check valve or pump to move the system.

6. To help with proper drainage

A check valve will maintain proper drainage because it allows you to switch between pumps in multiple sump pits by disconnecting a few connections and reconnecting them as needed.

Can You Pour Water Into A Sump Pump?

Yes, The purpose of doing this is to help the pump work more efficiently. You can also pour water into a sump pump to prevent it from freezing during cold weather.

The water will act as a lubricant to keep the main working parts of the pump from sticking together. The water can be warm, making it hard for the pump to work.


1. You must know what type of pump is in your sump pump because you can determine how to get water into it.

If the water you pour into your sump pump is clean and debris-free, it could benefit your pump. However, the water’s many impurities could clog your sump pump.

The type of sump pump you have will determine how you must pour water into it.

2. The size of the sump pump will also determine how you should get water into it. The size of the sump pump is measured in gallons per hour (gph). Sump pumps with a higher gph usually have to be emptied less frequently.

A bigger sump pump will also be able to handle large amounts of freezing water that may be in the drain pipe.

The optimal gph range for a sump pump is 0.5 – 3.0 gph, and the sizes of its components determine this.

Can A Sump Pump Run Continuously?

Yes, Several reasons cause sump dump to run continuously:

1. Clogged system

If your sump pump cannot remove the clog, it cannot work as intended, and you may need to run it continuously because of how plugged up the system has become.

If your water is too high, a continuous sump pump can help take care of excess water that may be getting in from other areas.

2. A stuck sump pump float

A stuck float can cause the sump pump to keep running, which you may not desire. However, you can quickly clear the stuck float using an unclogging solution.

Another reason your sump pump might need to run continuously is if you are using it as a drain for another drainage system and cannot empty the excess water from there.

3. Sump pump is not sized correctly

The most common reason for a sump pump to run continuously is that it cannot handle the expected water. In this case, you need a sump pump that can handle more capacity.

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4. Failed backup systems

If your sump pump cannot handle the water, you might have programmed it to run continuously. When a sump pump fails, it can still run continuously because it is considered a backup system.

If one sump pump fails, two backup systems in place will work together with each other.

5. Flooded pump

If your sump pump leaks, replace it with a new one. If the leak is from a damaged pump, not the pump itself, it will still run continuously.

Why Is The Sump Pump So Loud?

There are several reasons why the sump pump is so loud:

1. The fluid moving through a pipe as it flows

Just like when you pour the liquid out of a jug or bottle, the fluid moves quickly in the steam tube and can create sound waves when it hits an air pocket.

2. The sump pump is old

When you have had a sump pump in your house for years, its internal parts may become corroded or damaged.

3. The air intake is clogged

The air intake must be clear for the sump pump to work. If leaves, debris, or grass clippings block it, the pump will have difficulty pumping the water out of your basement and may make noise.

4. The pump is not running

If your sump pump is not running, it will not pump water out of the basement, causing the noise. It may also stop if it has to work overtime.

The only way to hear if your sump pump usually operates is by listening to the noise or making a video.

5. Inadequate or insufficient insulation

Insulation provides a barrier to sound waves so they don’t pass through the walls, ceiling, or floors. When there is too much or not enough insulation, sound can pass through and reach your ears.

6. Blocked piping

If leaves and vegetation clog the pipes from the water valve to the sump pump, the pressure from the water hose will be lost.

This means there will be no waste water flowing through the line and no water moving through your sump pump.

Do Pumps Need To Be Vented?

Yes, When a sump pump runs continuously, it can cause the water to be drawn back up from drains and into the hands of your family.

Instead, you should install a vent pipe that will carry away excess water without any return of it back to your basement. Here are the benefits of venting sump pumps

1. To ensure they operate efficiently

Venting can keep your sump pump from running too long and possibly drying out your basement.

2. To prevent airlocks

Two water sources go directly into the sump pump to create an airlock. This occurs when there is no venting system installed.

3. To prevent your pump from overheating

Overheating occurs when the water temperature in the sump pit rises significantly, which can cause damage to your pump’s motor and motor shafts.

4. Prolongs the life of the pump

Sump pumps that are continually running can wear out more quickly due to excessive electricity and water use.

5. To prevent pump failure

Pumping with a venting pipe may prevent the pump’s motor from failing if not used regularly enough to keep the motor appropriately lubricated.

6. To prevent odors

When a sump pump is not vented, an unpleasant odor can be emitted from the water.

Why Can’t Centrifugal Pumps Handle Air?

It is a type of pump you use to increase the pressure and flow in a system. They are typically used when you pump high-pressure liquids or gases at low velocity to create fluid motion.

There are several reasons why centrifugal pumps handle air:

1. The air can cause pressure loss– The pump is trying to move a material that is not fluid, and the centrifugal pump can handle liquids but not air.

2. The air can cause the pump bearings to overheat– The oil in the bearings may cause overheating and leave oily residues on the rotating parts of the pump, which can cause friction and loss of pressure.

3. Air can clog or damage internal valves or pumps– As mentioned above, air-filled pumps cannot handle liquids because they have less density than liquid. It can suck air in through a leak in the system and cause the system to lose pressure.

4. Air can build up in the system, which may interfere with the normal operation of the other components of the system. This can happen if you install air-filled pipes improperly or if a component needs to be sized correctly.

5. Air can also cause dangerous situations where a partial vacuum is created in a suction line, and gas or particles (e.g., oil, debris, etc.) are sucked into the system.

You should address this problem immediately to avoid accidents and damage to the system

What Causes The Water Pump To Overheat?

Clogged FiltersKeeping the filters in your water pump clean is essential so they don’t clog. This can lead to an overheating of your water pump because it is working too hard to push water without the help of the filter.
Too Much PressureSomehow, you can increase pressure when there is no need to raise it, which causes a problem with the amount of work needed for a regular job.

This then leads to overheating because the pump needs more work than assigned.
Damaged BearingsYou may have damaged the bearings of your pump, which can lead to overheating because the water pump is then trying to do more than it should be doing.
The Wrong Type Of PumpIf you installed a water pump not meant for your pool, you might need to replace it with a water pump suitable for your type and size.
Electrical ProblemsIf you have a pump that has been working for a while, and then suddenly it starts having issues, sometimes it can be due to an electrical issue.

Whether the wire is damaged or faulty, or the motor is broken, it can cause your pump to overheat because of its inability to do anything.
Broken or Worn ImpellerSometimes, the impeller can be broken or worn. This can cause your pump to overheat because it cannot push as much water as it should, which means it pulls much of its weight.

How Do I Know If My Water Pump Has An Airlock?

Abnormal SoundsIf you hear a whooshing sound from the pump, this is a sign that your pump may have an airlock.
Reduced water pressureIf your water pressure boasts lowness and you can see air bubbles coming from your faucet, this is a sign that your pump may have an airlock.
No water flowIf you have a slow, thin, or no water flow, this is a sign that your pump may have an airlock.
Water Pressure problemsIf you are using more water than recommended for your faucet and the flow is little, this is a sign that your pump may have an airlock.
Inconsistent water flowIf you have a water flow that varies from time to time, this is a sign that your pump may have an airlock.

How Do You Know If A Pipe Is Vented?

Smooth And Consistent Water FlowThe water should flow smoothly and continuously out of the pipe.
Water Does Not Spill Over The Edge Of The PipeIf water spills over the top of your sump pump, it is not vented properly, and more water will enter your basement.
Water Leaves The Sump Pump At A Uniform RateA variety of factors, such as the size and shape of the pipe, flow meter, and amount of air in the pipes, can affect the rate at which water is discharged from the pipe.
No Gurgling Or Bubbling SoundsThe water flow should be quiet and under pressure, without gurgling or bubbling sounds.
Presence Of An Air Relief HoleYou should distinguish this from a vent. If the sump pump becomes over-pressurized, an air relief hole allows air back into the pipe.


As you can see, water pumps are essential, and you should care for them properly. A water system comprises a series of interconnected parts that all have their jobs to do.

When one part is not working properly, other parts must compensate. This can lead to the overuse of electricity or water and cause an increase in your energy bills and a waste in your water bill.


Hi! I' am Tom. I was a manager in one of the biggest stores for over 10 Years, am also an SEO by night. I don't like to call myself a blogger; they are very analytical, do email marketing, and know all SEO stuff. I faced many questions from customers about different products, and there was hardly any help on the internet. After learning all the things about these products as a manager the hard way, I decided to start a blog and help other people.

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