Can I install a sump pump myself?

Yes. Sump pump installation is a manageable DIY project for someone comfortable with basic plumbing and concrete work. The main challenges are breaking the basement slab and routing the discharge pipe to daylight. Electrical connection is straightforward — most pumps plug into a standard 120V GFCI outlet.

How deep should a sump pit be?

Sump pits are typically 18–24 inches in diameter and 24–30 inches deep. The pit should be deep enough that the pump sits at least 6 inches below the normal water entry level, giving the float switch room to activate before water reaches the floor level. See our dedicated guide on sump pit depth for more detail.

Where should the sump pump discharge go?

Discharge should exit at least 10 feet from the foundation, sloped away from the house. Many municipalities prohibit discharging into sanitary sewer lines. Good options include a dry well, storm drain, or a low area of your yard at least 20 feet from the foundation.

Do I need a permit to install a sump pump?

Permit requirements vary by municipality. In most jurisdictions, sump pump installation does not require a permit if you're replacing an existing pump. Installing a new pit in a previously unequipped basement may require a plumbing permit. Check with your local building department before breaking concrete.

How to Install a Sump Pump (DIY Guide)

Installing a sump pump is a weekend project with lasting payoff. This step-by-step guide covers everything from breaking the concrete to testing the finished system — no plumber required.

Sump pump plumbing installation with PVC discharge pipe

Before You Start: What You Need

Materials

Sump pump (1/3–1/2 HP submersible recommended) — see options on Amazon
Perforated sump pit liner (18–24" diameter, 24–30" tall)
1.5" PVC discharge pipe and fittings
PVC check valve (1.5")
PVC cement and purple primer
Pea gravel (1–2 bags)
Hydraulic cement or vinyl concrete patch
Sump pit lid (solid or gasketed)

Tools

Rotary hammer drill with chisel bit (or rented jackhammer)
Shovel and 5-gallon buckets for soil removal
Pipe cutter or hacksaw
Drill and hole saw (for liner wall penetration)
Level
Tape measure

Time and Cost

Task	DIY Time	DIY Cost	Pro Cost
Pit excavation and liner	3–5 hours	$80–$120	$400–$600
Pump and discharge piping	2–3 hours	$150–$250	$300–$500
Concrete patch and finish	1–2 hours	$30–$60	$150–$250
Total	6–10 hours	$260–$430	$850–$1,350

Step 1: Choose the Right Location

Place the sump pit at the lowest point of your basement floor. Water naturally flows to the lowest spot — the pit intercepts it before it spreads. Avoid placing the pit:

Within 2 feet of any load-bearing wall or footing
Under a staircase (limits future access)
In a corner that's difficult to route discharge pipe from

Before breaking concrete, check for utility lines. Use a stud finder to locate any conduit, and call 811 (US) to have underground utilities marked if you're near any penetrations.

Step 2: Break and Remove Concrete

Rent a rotary hammer with a chisel bit from your local hardware store ($40–$60/day). Score a circle 4 inches larger than your liner diameter, then work inward. For a 20-inch liner, break a 24-inch circle.

Remove all concrete chunks. If the concrete is thick (4+ inches), it may take longer than expected — allocate two hours for demolition alone on older slabs.

Step 3: Excavate the Pit

Dig down 26–30 inches below the floor level. Remove all soil — use buckets to carry it out. If you hit groundwater during excavation, that's confirmation you need this pump.

The pit should be 6 inches wider than the liner on all sides to allow gravel backfill.

Step 4: Set the Liner

Pour 3 inches of pea gravel into the bottom of the hole.
Lower the perforated liner into the hole. It should sit so the top rim is 1–2 inches below the floor level.
Check with a level — the liner must be plumb. A tilted liner causes float switch problems.
Backfill the gap between the liner and dirt walls with pea gravel to within 2 inches of the floor surface.

Step 5: Install the Pump and Piping

Use a hole saw to cut a 1.75" hole through the liner wall, 4–6 inches from the bottom, for the discharge pipe to exit.
Connect the 1.5" PVC adapter to the pump outlet using thread seal tape.
Lower the pump into the liner. It should rest on the bottom with the float switch unobstructed.
Run 1.5" PVC pipe from the pump through the liner hole.
Install a check valve vertically, 12 inches above the pump outlet. Confirm the flow arrow points up.

A check valve is non-negotiable. Without one, water drains back into the pit every time the pump shuts off, causing short cycling that burns out the motor in months.

Step 6: Route the Discharge Pipe

The discharge pipe must:

Exit the basement through the rim joist or wall
Terminate at least 10 feet from the foundation
Discharge downhill away from the house
Not connect to sanitary sewer (illegal in most jurisdictions)

Install a freeze protection fitting or a flush valve at the exterior terminus to prevent ice blockage in winter. In cold climates, this is frequently overlooked and causes pump failure in January.

Step 7: Patch the Concrete

Mix hydraulic cement to a stiff consistency. Pack it into the gap between the liner rim and the broken slab edge. Smooth flush with the existing floor. Let cure 24 hours before running water near the area.

Step 8: Test the System

Plug the pump into a GFCI-protected outlet (code requirement in wet areas).
Pour 5 gallons of water slowly into the pit.
Watch the float rise and confirm the pump activates.
Verify water exits the discharge pipe outside.
Confirm the pump shuts off when the float drops.

If the pump runs but no water exits outside, check the check valve direction and confirm the discharge line has no sags that collect standing water and create an airlock.

Common Installation Mistakes

No check valve: Pump short-cycles and fails early.
Discharge too close to foundation: Water recirculates back into the pit.
Liner not leveled: Float switch gets stuck, causing continuous run or failure to activate.
Gravel omitted beneath liner: Reduces drainage, pit fills slower than it should.
No GFCI outlet: Safety and code violation.

When to Hire a Pro Instead

Consider professional installation if: your basement slab is reinforced with rebar (much harder to break), you need to tie into an existing French drain system, or your discharge needs to cross under a driveway or navigate complex routing. For straight-forward new pit installations, DIY is realistic for most homeowners.

Related Guides

Compare pump options before purchasing in our 2026 sump pump rankings. If the pump stops working after installation, see the troubleshooting guide. For complete backup coverage, read about battery backup sump pumps. Use the Cost Calculator to estimate your full basement waterproofing investment.