Submersible Pump Installation Ultimate Guide

If you’re looking to install a new submersible pump or just replacing an old one, here’s a detailed submersible pump installation guide that will help you install it properly and it should be operable for many years to come.

It can be said, without any sort of doubt, that the submersible water pump certainly exceeds and excels in performance compared to other kinds of residential pumps available in the market. Especially when it comes to deep well with a depth of 25 feet or more.

Some of the benefits of submersible pumps are that it never needs to be primed as it is already submerged underwater. Another good thing about submersible pumps is that it is quieter than most other above the ground well pumps. Submersible pumps are the most efficient when it comes to flow rate and power. And this kind of pump ensures higher water pressure throughout the house than a piston or jet pump can.

But as like all things, it too comes with a drawback. The installation process is a bit labor-intensive and time-consuming. Also, it is physically challenging as the pump, piping, and wires need to be lowered at a depth of 25 feet or more into the ground.

But once, installed correctly and maintained, these pumps are built to last for several years beating all other options.

Here in this article, you’ll find a step-by-step guide on how to install a submersible pump the right way. Follow these tested techniques by professionals and you should never have to worry again to deal with these unwanted hectic jobs of installing or replacing ever again, at least for several years to come.

What’s a Submersible Pump?

As the name suggests, a submersible pump, often called bore pump, sub pump or an electric submersible pump (ESP), is one that is submerged, usually in water or oil. The usual depth of such deep well pump is 25 feet underground or more.

It is a pump that is cylindrical. It’s a long and slender in size and shape. The pump is usually situated four to five feet above the bottom of the water well. For a typical household, a 0.5 HP or 0.75 HP motor suffice. Generally, an inch of a pipe is adequate for delivering up to 15 gallons per minute (GPM) for reasonable distances. However, you can go with an inch and a quarter pipe if you intend to have a higher flow rate.

How to Install a Submersible Pump: Submersible Pump Installation Guide – Step by Step

This section will focus mainly on submersible well systems generally used in suburban and urban residential and semi-commercial (farms, campgrounds, etc.) settings. These deep and underground pumps are quite powerful compared to shallow pumps and are equipped with 0.5 HP to 2 HP two-wire pump that runs at 240v power single-phase, and pumps at a whopping 10-20 GPM (Gallons per minute) in wells four to eight inches in diameter and use a pressure tank.

Installing a 100 feet deep submersible pump is not an easy task and requires time, patience, and skills.

Following are steps required to install or replace a submersible pump:

Do Some Visual Inspection and Check for Some Key Terms

Check Some Key Features and Inspect the Supplied Components

Attach the motor to pump

Lubricate the splined shaft using the supplied grease and seal it properly. Then use thread tape and screwdriver to attach the motor to the pump tightly and securely.

Connect the drop cable to the motor and heat-shrink

Splice or connect the drop cable to the motor leads but before that use the supplied cable splice kit to heat shrink the cables and make sure the wirings are properly waterproof. You may need to use a heat gun or a butane torch to do the heat-shrinking as a regular lighter won’t do the job.

Place the pump and cable assembly close to water well

And then attach the rising main to the pump and roll out. Connect the bore cap to the other end of the rising main.

Layout drop cable together with rising main

Securely attach the stainless steel safety cable to the sub pump and also roll out this safety cable along with the rising main and drop cable.

Use duct tape every 5-6 meters to tightly secure the drop cable with the rising main.

Zip ties may also be used. Leave about 50mm of slack each time you tape up the drop cable with the rising main for it to be able to stretch if needed. It’s a good idea to double back some cable below the bore cap in case you may need servicing at some later date.

Check to see that the pipe and hose connection are tight and secure. Allow some slack for the cables for stretch.

Now if the overall weight of the entire assembly is light enough, carefully lower the pump into the well and take assistance from someone if needed. Pay attention not to damage the electric drop cables while lowering the pump and assembly. Lower it down until the pump rests on the casing.

If the pump and assembly too heavy for one or two-person, you may use a tow truck and a roller to lower the pump down into the well.

Finally, connect the pump starter with the pump motor and power it on and then test the pump. It may take a few moments for the water to reach the ground level.

How to Install a Submersible Pump


The initial installation for a submersible pump may be a daunting task to undertake. But if done right at the beginning, the added benefits of having worry-free clean and safe drinking water and water for household chores cannot be denied. If you properly follow the above guidelines and install the submersible pump correctly, it should last for several years and you won’t have to bother doing it again.

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