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  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon592
    Verified sump pump installation services reviews

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

Avatar for Contractors' Waterproofing
Contractors' Waterproofing
4.8(
62
)
Sump Pump or Interior Foundation Drains - Install

Serving Katonah, NY and surrounding areas

Approved

Super Service Award Winner

In business since 1985

Free estimates

Credit card accepted

"I felt the need to write this review, although technically Greg and I have never done business. In the recent round of rain storms, my sump pump stopped working as it is supposed to, and I ended up with about 5 inches of groundwater in the basement. I was able to get the sump pump working again, but 3 days after it stopped raining, I was still getting a lot of water in the pit. I found a sticker for Contractors Waterfproofing, and figured they might of installed the system for the old owners, so I gave them a call. From the moment he picked up Greg was service oriented and responsive. He asked for my address to look up the job, and when he couldn't find it, he called back within 5 minutes to ask what was going on. I explained the problem, and he immediately told me that was normal for my part of town, and told me I just needed to replace the pump and I would be fine. He offered me a price that was half what his competitors charge, and was willing to explain the whole job in detail."
30 YEAR OLD BASEMENT
AFTER WATERPROOFING
Vapor Barrier
Why Your Basement is Wet and Damp
Thies Is How We fix

+1

Response time8 hrs
6 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for PDC & Sons Inc.
PDC & Sons Inc.
5.0(
32
)
Sump Pump or Interior Foundation Drains - Install

Serving Katonah, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2014

Free estimates

Emergency services offered

"Found and fixed a leak that 3 other plumbers could not find. Installed 2 new faucets, a new disposal, and valves behind our washing machine and under the kitchen sink. All work was done extremely well. Paul is dependable and professional."
Acid Neutralizer & Water Softener installation
Bathroom Renovation
Bathroom Renovation
Bathroom Renovation
Bathroom Renovation

+18

Recommended by75%of homeowners
Avatar for Connecticut Basement Systems, Inc.
Connecticut Basement Systems, Inc.
4.3(
589
)
Sump Pump or Interior Foundation Drains - InstallSump Pump - Repair or Replace

Serving Katonah, NY and surrounding areas

Approved

In business since 1987

Free estimates

Warranties offered

"Amazing. YES - you pay a lot - but they rocked, their solution rocked, and the installation was flawless. We just built a brand new home and the builder put in the cheapest 24" deep sump pump possible. We live in an area known for basement flooding so I did my research - had several companies come in - and settled on Connecticut Basement Systems. But my LORD - expensive. But now I know why. Their crew of 3 showed up and laid down plastic mat from our front door all the way down to the basement (at least 200'). It was over kill - but then I saw why. They had to dig a 36" deep pit and a wider hole - and brought up all the mess in buckets. NOT A SINGLE DROP ON THE BASEMENT FLOOR OR ONE THE WAY UP THE STAIRS. In fact - if you didn't see the high tech 3 pump sump pump they installed - you would have never known they were there. EVERYONE was super nice and answered all my many questions. I just spent a year in **** building a new home - and this was the best experience I've had with a contractor in 10 years. Pay the bucks - great product - great installation - great service."
Additional Photos
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Additional Photos

+12

162 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Supreme Mechanical Group Corp
Supreme Mechanical Group Corp
5.0(
10
)
Sump Pump - Repair or ReplaceSump Pump or Interior Foundation Drains - Install

Serving Katonah, NY and surrounding areas

Approved

In business since 2015

Emergency services offered

Small jobs welcome

Premier provider of residential and commercial plumbing and mechanical solutions also drain cleaning and sewer main unclogging serving the Tri-State area, including New York and New Jersey. \n \nFrom emergency repairs to comprehensive system installations, we combine industry expertise with high-quality workmanship to keep your properties efficient and safe. At Supreme, clear communication and a customer-first approach give you the peace of mind that your mechanical systems are in expert hands.

Hotel drain cleaning
Hotel drain replacement
Hotel drain cleaning
Fire pump installation
Sink repair

+4

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Sump Pump Installation FAQs, answered by experts

Yes, it’s normal (and beneficial) to have a small amount of water in the bottom of your sump pit. It shows that your system is collecting groundwater, rain, and excess water from around your property—just like it’s supposed to. However, if the sump pit is always full, you might have a leak or a faulty sump pump.

When a backflow valve fails, wastewater will flow back into your system, contaminating your drinking water. You’ll immediately notice backflow valve failure from a rotten smell and brown water coming from faucets. Get in contact with a septic pro or a plumber immediately if you suspect this has happened to you.

Sump pumps remove excess water from the lowest point of your home, which prevents flooding. When a sump pit fills with water, a sump pump pushes that water outside of the basin and into an exterior discharge pipe. From there, the water flows away from your home, so it doesn’t damage your foundation.

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.

There are several things you can do to maintain your sump pump and prevent sump pump problems. For instance, keeping a lid on your sump pit goes a long way in protecting your pump system from silt, sand, dirt, and other debris. When water drains from the outside, such as along your foundation, or with melting snow, water runoff often brings sediment with it. 

Also be wary of corrosion, particularly if your sump pump system is made of metal. Keep an eye out for rust and have it inspected regularly by a plumber or sump pump technician.

The Katonah, NY homeowners’ guide to sump pump installation services

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