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    Verified sump pump installation services reviews

Top-Rated Sump pump installation pros in Thornton - Updated Nov 2026

Avatar for Flatirons Plumbing, Inc.
Flatirons Plumbing, Inc.
4.7(
265
)
Sump Pump - Repair or ReplaceSump Pump or Interior Foundation Drains - Install

Serving Thornton, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Free estimates

Emergency services offered

"We had a sewer line leak, a sump pump replacement, an outdoor faucet replacement, a tub drain repair and expansion sleeves installed on vertical sewer pipes. Anthony was very knowledgable and helpful. Everything fixed and I would hire Flatirons again.."
Our Flatirons Plumbing Team!
We promise to listen to our customers
The Flatirons Plumbing Team
Response time5 hrs
5 neighbors recently requested a quote
Recommended by83%of homeowners
No Limits Plumbing & Drains LLC
5.0(
112
)
Sump Pump - Repair or Replace

Serving Thornton, CO and surrounding areas

Approved

In business since 2024

Customers say: True professional

We pride our company on reliability, great communication, \nintegrity, and quality work. We are experts in our trade and will do our best \nto keep you as educated as we can on your particular task or project. We are licensed and insured. We look \nforward to earning your business!

17 neighbors recently requested a quote
Recommended by55%of homeowners
Avatar for Waterworx Plumbing
Waterworx Plumbing
4.8(
99
)
Sump Pump - Repair or ReplaceSump Pump or Interior Foundation Drains - Install

Serving Thornton, CO and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"Mr. Howell was punctual on the first visit to give an estimate for the job. He explained the charges clearly. An appointment was made for installation with the lady at the office for a much later date as the replacement faucet was not yet available. This appointment was rescheduled for an earlier time when the faucet arrived sooner than expected but Mr Howell did not show up for that appointment. Some internal miscommunication. Another appointment was made for the following week. He showed up on time for this one and installed the faucet in good time. The faucet being replaced had failed almost completely by then. The office staff is fantastic and very helpful. It was she that got my business since Mr Howell’s charges seemed a little high. The advice and assistance she gave me was worth the higher charges. However, I am not an expert on such things. The charges were explained up front. No fee was charged for the visit to give an estimate along with advice/confirmation of the type of faucet I would need."
2 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for Precision Plumbing Heating Cooling Electric
Precision Plumbing Heating Cooling Electric
4.5(
198
)
Sump Pump - Repair or Replace

Serving Thornton, CO and surrounding areas

Approved

In business since 1982

Warranties offered

Credit card accepted

"Jeff Scott is knowledgeable, and very friendly. He answered all my questions about heat pumps, furnaces and on demand water heaters. He worked quickly and efficiently and was very helpful."
Response time6 days
20 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Rooter Guy, LLC
Rooter Guy, LLC
4.6(
3,131
)
Sump Pump - Repair or ReplaceSump Pump or Interior Foundation Drains - Install

Serving Thornton, CO and surrounding areas

Approved

Super Service Award Winner

In business since 1995

Free estimates

Emergency services offered

"Rooter Guys installed a sump pump in my basement after we began experiencing flooding. They rearranged their schedule in order to fit us in sooner given the urgency of the project. They were professional, hardworking and kept us informed throughout the process."
sewer cleaning
1277 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Afford-A-Rooter
Afford-A-Rooter
4.4(
138
)
Sump Pump - Repair or ReplaceSump Pump or Interior Foundation Drains - Install

Serving Thornton, CO and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"The company showed up when they said they would and completed the job within the time frame that they stated. Communication was a little rough with the field, but communication with the office was very responsive. Considering the extent of the work and the constraints within which they had to work, there was remarkably little collateral damage done. Unfortunately I was not able to witness the work before it was covered up and so I cannot comment on the quality of the installation, but can say that the company did a good job protecting the surrounding landscaped areas and seemed contentious and thoughtful in their approach to the work. I would definitely work with them again."
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+7

Response time5 days
Response rate100%
2 neighbors recently requested a quote
Avatar for Rocky Mountain Plumbing & Drains LLC
Rocky Mountain Plumbing & Drains LLC
4.9(
26
)
Sump Pump or Interior Foundation Drains - Install

Serving Thornton, CO and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

At Rocky Mountain Plumbing & Drains LLC, we provide reliable, professional plumbing services for residential customers across Colorado. From drain cleaning and leak repairs to water heater installations, fixture replacements, and full plumbing system services, we focus on quality workmanship, honest pricing, and fast response times. As a family-owned company, we take pride in delivering dependable service, clear communication, and lasting solutions you can trust.

Interior Sewer replaced
Interior Sewer replaced
Interior Sewer replaced
Interior Sewer replaced
Interior Sewer replaced

+1

Avatar for TYCO Plumbing Corporation
TYCO Plumbing Corporation
5.0(
60
)
Sump Pump - Repair or ReplaceSump Pump or Interior Foundation Drains - Install

Serving Thornton, CO and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"Tyco is simply the BEST. A company and people who are genuinely good. I couldn't ask for a better or more honest plumber. Tyler is fantastic, and Rich and Mike are outstanding. Seriously, they're there when you need them and you never have to worry about if they're being honest. This is a company that values their customers and the relationships built. Tyco has done multiple jobs for us. They've installed a tankless water heater, cleaned out drains, fixed faucets, installed toilets, and more. Seriously, if you are reading this, you're in need of a plumber. Stop looking and just call Tyco. You'll never have to search for a plumber again. Thank you, Tyco!!"
Tub/Shower valve upgrade
New 1/4 turn main with pressure reducing valve.
Upgraded disposal with drain modifications. (AFTER
Leaking disposal with improper drain. (BEFORE)
New fiberglass tub install

+2

Response time2 hrs
4 neighbors recently requested a quote
Recommended by98%of homeowners
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Sump Pump Installation FAQs, answered by experts

If your sump pump isn’t engaging, it might be clogged with dirt and debris. Check to see if the fitting lid is loose and has been letting debris in. Next, check the float and make sure it’s not obstructed by rust or gunk, which results from insufficient maintenance. Tangled wires or damaged switching systems can also stop your sump pump from engaging.

3/4 HP is stronger than 1/2 HP. Horsepower measures how much weight can be moved and how fast, or the power needed to move 550 pounds one foot in one second. 1 HP equals 550 foot-pounds per second, so the higher the horsepower, the heavier the load it can lift. While 1/2 HP is a standard, powerful option, 3/4 HP has the extra strength to handle heavier, larger doors with ease.

A sewage ejector pump is necessary if you have any plumbing fixtures, such as a bathroom, laundry room, or sink, located below the level of your home's main sewer line. Standard plumbing relies on gravity to move wastewater and solid waste to the municipal sewer or septic tank. However, for fixtures located below grade (e.g., in a basement), gravity is not sufficient.

The purpose of a sewage ejector pump is to actively pump this wastewater and solid waste upward into the main sewer line. Without an ejector pump in this situation, wastewater would have no way to exit and would eventually back up, causing a sewage overflow or flooding in your basement. If all of your home's plumbing is on the main floor or higher, gravity can handle the drainage, and an ejector pump is not needed.

Thankfully, you do have a few sump pump backup options in case it fails. One option is a battery-powered backup sump pump. Another option is using a portable backup generator as a power supply for your sump pump. Unlike a battery-powered backup which has limited power, a generator can run around the clock for as long as you need it. 

Or you can opt for a water-powered backup pump, which uses your home’s water supply as a source of power. However, this may not be the best option if you find your house frequently has low water pressure.

Inspect the pump annually, test the float switch, and clean the discharge line to ensure efficient operation.

The Thornton, CO homeowners’ guide to sump pump installation services

From average costs to expert advice, get all the answers you need to get your job done.