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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
Clear Water Pump & Water Conditioning, LLC
4.8(
31
)
Sump Pump - Repair or Replace

Serving Katonah, NY and surrounding areas

Approved

In business since 1997

Free estimates

Customers say: Quick response

"Wasnâ t sure how to rate the value for the money-could also be 5 stars.Had a new well tank installed -the price for the tank itself was higher than any I saw on Amazon but I never checked for the exact same one.Mostly was impressed with how quickly he responded not only to my initial request on Home Advisor but to any follow up as well.Response to any text was immediate . Not my usual experience with any type of home repair workman or contractor"
Response time11 hrs
Recommended by100%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 Groundworks
Groundworks
4.9(
13
)
Sump Pump or Interior Foundation Drains - Install

Serving Katonah, NY and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 2025

Free estimates

Warranties offered

Groundworks is the North America's leading and fastest-growing foundation repair and water management solutions provider. Groundworks is a vertically integrated company with its own manufacturing operations and a world-class software solution, allowing us to serve our customers more effectively. From the first phone call to the annual maintenance offered, our customers have peace of mind knowing we're there with one mission to repair, protect and improve their home. For state licenses visit Groundworks.com/licensing

Foundation
Foundation
Foundation
Concrete
Concrete

+16

410 neighbors recently requested a quote
Charles Mechanical
5.0(
37
)
Sump Pump or Interior Foundation Drains - InstallSump Pump - Repair or Replace

Serving Katonah, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Credit card accepted

Offers commercial services

Charles Mechanical is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you!

Response time10 hrs
Response rate93%
7 neighbors recently requested a quote
Avatar for Cassidy Plumbing and Heating, Inc
Cassidy Plumbing and Heating, Inc
4.5(
32
)
Sump Pump - Repair or ReplaceSump Pump or Interior Foundation Drains - Install

Serving Katonah, NY and surrounding areas

Approved

Super Service Award Winner

In business since 1992

Emergency services offered

Warranties offered

"Cassidy is professional, punctual, and clearly communicate. Thank you for guidance and repairing our corroded pipe. Thanks for installing the valve for the expansion tank too! I didn’t realize how much money that will save us in the future. ??"
Heating System
Heating System
Plumbing
The Team
Navien Water Heater

+3

Response time2 days
Response rate100%
8 neighbors recently requested a quote
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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Showing 1-10 of 242
Sump Pump Installation FAQs, answered by experts

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.

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.

Sump pump repairs are typically handled by plumbers or waterproofing specialists who are experienced in handling basement and foundation-related issues. Plumbers can address issues like clogs, electrical problems, and mechanical failures, and waterproofing professionals may be ideal if the sump pump is part of a larger drainage or waterproofing system. 

Some people may also call on a general handyperson for minor sump pump repairs. However, for complex problems, hiring a certified plumber or waterproofing expert ensures the work is done correctly and prevents further issues.

Sewer ejector pumps need to be cleaned at least once a year by a professional. You shouldn’t attempt to clean it yourself because it can release sewer gasses that are toxic to humans and can be fatal. But to keep the system as clean as possible between professional inspection and cleaning services, be sure to only flush human waste and toilet paper. Avoid flushing items that can clog the system, like paper towels, grease, oil, or menstruation products.

Yes, many providers offer warranties for new pumps and labor. Confirm terms before scheduling.

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.