How To Adjust Sump Pump Float Switch? Step By Step Guide

If you are wondering how to adjust sump pump float switch, you’ve come to the right place. 

It’s simple to avoid basement flooding by ensuring your sump pump works properly. You must correctly install all components for the sump pump. The sump pump float is an essential component. It tells the sump pump when to turn on and remove water from the sump pit. 

When there is insufficient water in the sump, it will not operate correctly, which may result in flooding issues. It’s crucial to understand how to adjust sump pump float switch correctly and safely. 

This post will tell you how to adjust the sump pump float by following the simple steps. 

What Is A Sump Pump Float Switch?

To understand how to adjust sump pump float, you need to know how the best sump pump works. 

A sump pump sits in a sump pit under your house and removes any water that flows into the pit from inside or outside your house. Your sump pump draws the water out of the sump pit and away from your home, preventing basement flooding. 

A float switch activates the sump pump. When water begins to flood the sump pit, the float switch turns on, avoiding potential problems. The majority of float switches function in the same manner, but there are many different types. 

When the sump pit refills with water, the floating component triggers a switch, activating the pump. The design for the float switch is a critical element of this process. 

How To Adjust Sump Pump Float Switch?

You can control the volume of water entering your home with a sump pump. You must adjust the float valve on sump pumps properly to function correctly; otherwise, they will either not activate or stop pumping water. 

Sump pump adjustment is easy and requires no tools other than: 

The procedure of how to adjust sump pump float valve on sump pumps is outlined below. 

1. Disconnect From Power

When working on your sump pump, it is always better to be on the safe side. Ensure the extension cord is disconnected or the power at the breaker box is turned off. Mixing water and electricity always carries a risk of electrocution, so it is always best to be safe.

2. Adjust Float Up Or Down

Adjust the sump pump float switch up or down according to the water level in the basin. The water level determines whether the tether or rod is higher. 

Raise the rod to the proper height if the water level in your pump basin is higher. Conversely, lower the cord or rod to the correct size if the water level is too low.

  • Adjusting Manually

You can adjust a manual float switch easily. It would help if you raised or lowered the rod or rope according to the water level in the pit. You may use hand operation or a normal-sized screwdriver to adjust most systems. 

Shorter rods and tethers are preferable for lower water levels, while higher rods and ropes are better for higher water levels.

  • Adjusting Electronically

An electronically controlled float switch is adjusted by turning a screw that alters the settings inside the pump. Every screwdriver turn increases or decreases water-sensing electronics inside the pump body. 

When water touches these sensors, the pump activates and runs until the water levels have dropped below them.

3. Test The Pump With Water

Once you’ve correctly set your float switch, you can test it out. Fill a bucket (or buckets) with water and fill the hole to the point where you want the button to turn on. 

See if the water turns on the sump pump. If not, drain the water and repeat it until you get it right. It may be time-consuming, so you should get it right first.

4. Re-adjust As Necessary

Start from step one if you need to re-adjust to test the process. Several possible explanations exist for a sump pump that keeps running after multiple readjustments. You must carefully balance the height. 

Adjustments of a minor nature are usually required to fix the problems you are experiencing. If you over-adjust, you may have to start over again to get it right.  

Look at these diagrams on how to adjust sump pump float switch to make it accurate.

How High Should The Water Level Be In The Sump Pump?

To understand how to adjust sump pump float, you need to know the appropriate height of the float switch. 

The correct length for your float cord is the length at which the circuit is activated when the sump pit fills with water to a certain level. A few inches of the cord should be left at the top of the sump pit so that the pump can activate adequately but not unnecessarily as the pump drains the hole. 

Setting your float switch at the appropriate height is crucial—however, it may require some experimenting to get it just right. Your float switch should trigger the pump when the water rises about 5 inches in most pools to function correctly.

Types Of Sump Pump Float Switches

To understand how to adjust sump pump float, you need to know the different float switches. 

There are numerous kinds of float switches for your sump pump. Each one has a unique “float” part and a unique method of switching on the switch. 

All float switches function by detecting when the water level has reached a certain point, triggering the sump pump. A float switch activates the sump pump when the water level has reached a certain level, and the length of the float cord has been correctly adjusted. 

Vertical and Electronic float switches are the two most common types.

  • Vertical Float Switch

Vertical switch includes a float that is lighter than the surrounding water. The switch is connected to the pipe and plugged into a power source. The button is simple in design. When the water rises, the float moves up the vertical shaft it’s attached to. When the float reaches the top of the shaft, it presses the switch, starting the pump. 

The button can be lowered or raised along the discharge pipe by altering the pole length to which the float is attached.

  • Electronic Switch

An electronic switch is another kind of switch. It connects to the discharge pipe and detects water levels. Instead of having a free-floating device that determines the water level, an electronic field specifies it in an electronic switch. The pump will operate if the water level is between the two lines on the switch’s body. 

The procedure for how to adjust sump pump float switch is the same as the previous one. Raise or lower the button according to the water level you desire.


A sump pump is an essential element of any building. Knowing how to fix sump pumps is beneficial. You might adjust the sump pump switch for several reasons, but the ultimate objective is to have it operating efficiently. 

Whether you’re learning how to adjust sump pump float switch or any other one, it involves patience to get it into the correct position. In the end, do-it-yourselfers can accomplish this task. 

Hopefully, this guide on how to adjust sump pump float switch solves your problem.

Related Posts

How to deodorize sump pumps

Sump Pump weep hole installation guide

Michael Bowen

Michael Bowen

Michael Bowen is an ambitious entrepreneur who has been in the business of building homes since he was 19. Michael's commitment to honesty, integrity, and high-quality workmanship has earned him a reputation as one of the best in the business.

We will be happy to hear your thoughts

      Leave a reply

      Build Better House