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How to Prime a Well Water Pump: 5 Easy Steps to Follow

When water function doesn’t work properly, it’s a really big pain in the neck. In that case you can prime a well water pump. But, it’s more difficult to do it unless you know the right way.

How to prime a well water pump?

Priming a well water pump is not that difficult. It means preparing it for the task. To prime your well water pump you need to run water through the pump inside the casing. This makes sure when the water’s been pumped the pressure of water won’t break the pump. 

You may think priming is just putting water in the case of the pump. We’ve detailed steps here explaining the parts for you to prime your pump. 

So why don’t you dive down into the details? Let’s just do it-

How to Prime the Pump?

Priming means you are preparing the pump to do its job. A water pump is quite necessary these days. We take it for granted sometimes. 

The process solves the building pressure of the pump as well. Otherwise, the pump will build pressure slowly

Priming the water pump will make sure it does its job perfectly. There are a few easy steps to prime your pump. 

The steps are given. 

Step 1: Remove the Plastic Plug From the Pump

When you get a new pump, there is a cap on. The plug usually sits at the top side of the pump. The manufacturer sets the plug so that it doesn’t get clogged by dust and dirt. 

The plastic plug should come off when you pull it. Or it might have screwed up. In that case, twist it to the right to take it off. 

Step 2: Run Water through the Pump Casing

You need to run water into the pump before you turn it on. This step makes sure the water will not put too much pressure on the pump. 

You might need to remove a few bolts also. A wrench is a perfect tool to do the job. These below-listed wrenches are really easy to hold on to and have a good grip:


These are some really good performing wrenches. Made out of stainless steel. So these won’t catch rust on them. 

Take the hose and run water through the pump. This introduction of water to the pump will take the water pressure down a bit. Run the water until water is coming out of the other end. 

This water coming out from the other end makes sure the case in the pump is full. 

Step 3: Partially Put the Prime Plug

Now that the pump case is full of water. You can remove the hose and insert the prime plug there. 

This will clean if any dust stays inside the pump as well. A new pump can supply dirty water

The prime plug goes on the top. Make sure to run the pump until air bubbles stop coming out. The air bubbles are going to come out from the bottom of the pump.

Step 4: Eliminate the Water Bubbles

The air bubbles mean that the case is still not full of water. Mainly the air bubbles are trapped air in the pump. The trapped air can cause disturbance when you use the tap. 

So make sure water bubbles are eliminated.

The water bubbles should be eliminated when you fill the case with water. But if it doesn’t you need to repeat step 3 again. 

By repeating step 3 all the air bubbles are going to be eliminated. Eliminating water bubbles makes sure even pressure and smooth water flow. 

Step 5: Insert the Prime Plug in

If there are no more air bubbles coming, plug the pipe completely. When you plug the pipe there should be no water bubble in the water.

The water will flow completely naturally in a smooth stream.

By following all the steps, the priming of your new pump will be done. Priming the well pump is an important step.

Is Priming Well Pump Really Important?

Whenever you want your newly bought tool, it is better to prepare them for their task. A water pump is a tool that all of us use on a daily basis.

An average household uses a ½ hp well pump. Priming the pump is necessary in that case.

The ¾ hp well pump has less pressure on them. But when we compared ½ and ¾ hp, we saw priming is beneficial in both cases. 

Priming a water pump makes it ready to deliver water to the taps and hoses in your house. It will ensure a free flow of smooth water through your taps. 

A good quality well pump comes around in four figures. So it’s gonna cost you a lot if it ever breaks down. Priming costs you nothing. Priming is really easy. Just follow the above steps. 

Can the Pump Lose the Prime Over Time?

Priming is only needed to be done one time when you buy the pump. But over the period of time, the prime can go loose. 

A prime has been tampered with when there are leaks in the intake pipe. Other than water leakage, air bubbles will go through the pipe. And the smooth water flow will be disturbed.

In that case, just replace the water intake pipe of the pump. When installing a new water intake pipe, follow the above priming steps. 


Questions: How to keep the well pump primed?

Answers: Keeping well pumps primed is not a tedious task. Water leakage will cause the prime to lose. 

Question: How can a pump lose its prime?

Answer: Water leakage is the main reason for a pump to lose its prime. Make sure there is no water leaking from the intake hose. 

Question: Are there self-priming pumps in the market?

Answer: There are self-priming pumps available in the market. Submersible pumps sit underwater and are self-primed. 


By reading all the steps, you should know how to prime a well water pump.

Priming a pump is really important for the long life span of your pump. But Before priming, observe everything properly.

Happy plumbing!