How to Make a Sump Pump Pit

sump pump pit
  • 2-4 hours
  • Beginner
  • 30-60
What You'll Need
Tape measure
Sump pump liner
Digging equipment

A sump pump pit is a crucial part of your sump pump. It eliminates excess water that may gather in the crawlspace or basement. This water can cause many problems for the interior of your home, including mold growth, which can be very hazardous to your health. A sump pump pit installed with your sump pump will help prevent mold from growing and improve drainage.

Step 1 - Find the Problem Spot

Your sump pump pit needs to be located where the water accumulates. That will help the sump pump pit do its job properly. Even after you have picked the spot, you will still need to be sure that you have no drain lines or utility lines nearby.

If water accumulates around this area, then you should get as close to the area as possible while still steering clear of the lines. If you are unsure whether these lines are present, proceed slowly and carefully. It’s best to have the utility companies come out and identify the location of gas, electrical, and water lines.

Another thing to keep in mind when it comes to the location is that the sump pump pit should not be located near any outside openings because the temperature in that area is much colder, putting the system at risk of freezing.

Step 2 - Dig

Dig the pit 2-feet wide and 2.5-feet deep. Ensure that there are no large rocks, roots, or other obstructions in the way. Taper the walls of your pit if needed. In order to determine the size of the hole you will drill, base it on the size of the liner that you are installing.

Step 3 - Insert Liner

When inserting the liner, ensure that the liner fits smoothly and that it is level. All of the voids which surround the pit will need to be filled with dirt. Doing so secures the liner in its place. It is very important that the liner is kept level throughout this entire process.

Dirt and other debris can do quite a bit of damage to your sump pump. If laid correctly, the liner will allow water to pass, but it will block all debris and dirt. That is what keeps your sump pump working well over time and helps to avoid complete replacement.

Step 4 - Additional Tips

If you already have the pump installed, make sure that the liner fits it properly. Leave 1-inch of clearance on every side of the sump pump.