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  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon40
    Verified french drain services reviews

Find French drain pros in Cornish

Gotme Under Pressure ?, LLC
4.3(
648
)
Drain Clog or Blockage - Clear

Serving Cornish, NH and surrounding areas

Approved

In business since 1987

Free estimates

Emergency services offered

"Exchanged messages with Mike to describe work needed, replace an outdoor faucet and shutoff value (previous faucet was leaking). He gave an estimate, reviewed work to be done. Replaced outdoor spigot with a frost-proof spigot, put on new value. Quick test and validation. Professional, efficient and happy with work done! Thank you Mike !"
Recommended by88%of homeowners
Avatar for Northern Basement Systems
Northern Basement Systems
4.6(
21
)
Basement Drainage Channels - InstallFoundation Drainage - Install or Replace

Serving Cornish, NH and surrounding areas

Approved

In business since 2010

Free estimates

Warranties offered

"Northern basements was able to fit us in quickly, pulled our crooked cement wall back in-place and sealed the wall to prevent future leaks.  The work was timely, communication was friendly and detailed, and price was as to be expected for the large amount of work that needed to be done.  We are very pleased with the whole process as well as the results.
"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+25

Response time1 day
6 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Groundworks
Groundworks
4.6(
26
)
Sump Pump or Interior Foundation Drains - InstallBasement Drainage Channels - Install

Serving Cornish, NH and surrounding areas

Approved (Corporate)

In business since 1996

Free estimates

Warranties offered

"Joe,James and Bobby did an excellent job replacing the sump pump And drains. My husband and I were so impressed with their abilities and how hard working they were. I would highly recommend Ground works Manchester to anyone who needs the same work done. Thanks to all the gentlemen for their professionalism and work ethic"
Foundation
Foundation
Foundation
Basement
Basement

+16

Response time12 hrs
208 neighbors recently requested a quote
Recommended by56%of homeowners
Avatar for We Do It All
We Do It All
5.0(
1
)
Sump Pump or Interior Foundation Drains - Install

Serving Cornish, NH and surrounding areas

Approved

Free estimates

Small jobs welcome

Offering multiple services with over 20yrs experience in multiple trades. Giving customers quality work at a fair price. Located in Newport NH. If your within 35 miles of Newport give me a call no mater the size of the job, Offering services from carpentry and remodeling to welding and much more. Call and schedule a free estimate anytime 7 days a week

4 neighbors recently requested a quote
Avatar for Basement Solutions LLC
Basement Solutions LLC
New to Angi
Basement Drainage Channels - InstallFoundation Drainage - Install or ReplaceSump Pump or Interior Foundation Drains - Install

Serving Cornish, NH and surrounding areas

Approved

In business since 2025

Free estimates

Warranties offered

We pride our company on reliability, integrity and quality work. We are experts in our trade. We look forward to earning your business! We specialize in concrete crack repair and injections, basement waterproofing, sump pump installations, basement and egress window installations, crawlspace repair, moisture control, foundation repair and so much more.\nCall us today for a free estimate.

Egress
Egress
Egress
Sump Pump
Perimeter System

+4

12 neighbors recently requested a quote
Avatar for Gotme Under Pressure ?, LLC
Gotme Under Pressure ?, LLC
4.2(
640
)
Drain Clog or Blockage - Clear

Serving Cornish, NH and surrounding areas

In business since 1987

Free estimates

Emergency services offered

"I got a call from Mike right after placing the request. We set up a time to come out and fix the clog in my tub and he was early. Within 45 minutes he had the clogged drain fixed working properly and gave some professional advice on the drain system. I would highly recommend using them for all plumbing needs."
Response time6 hrs
Recommended by89%of homeowners
Avatar for Viper Drain Cleaning
Viper Drain Cleaning
4.1(
48
)
Drain Clog or Blockage - ClearDrain Clog or Blockage - Clear - For BusinessDrain Line Breakage - Camera Locate+1 more

Serving Cornish, NH and surrounding areas

In business since 2020

Free estimates

Emergency services offered

"The owner showed up in under an hour, took a look at the problem, brought in the necessary equipment, went to work immediately and finished the job in under 30 minutes. Chris was polite, knowledgeable and just a very likable worker. Earlier I had asked another plumbing company to come in to snake out a kitchen drain. What a mistake, the other company came in and presented 6 options to fix the clog. They charger me $99 to present solutions from $550 to $5500 (compleate under the sink rebuild). Completely wasted $99. Chris got the drain snaked and cleared for $195. Thanks Chris"
Main Sewer Line Blocked
Response time3 hrs
Response rate97%
Recommended by87%of homeowners
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French Drains questions, answered by experts

While some chemical drain cleaners with hydrochloric acid can dissolve hair, this method is not recommended as it can also destroy your plumbing pipes. A common DIY alternative is using baking soda and vinegar, which can help break down the clog but will not actually dissolve the hair. The best and safest method for clearing a hair clog is to remove it manually. You can use a drain snake, a straightened wire hanger with pliers to fish out the clog, or have a plumber use a professional auger for more severe blockages.

Vinegar is better for an AC drain line because it’s less corrosive and won’t damage the pipes. It’s also a safer and easier product to use. Bleach should not be used on your AC drain line because it can corrode your pipes and harm the evaporator coil in your air conditioner.

It’s possible to snake minor drain clogs yourself, provided they sit within a foot or two of the drain itself, but it’s usually best to hire a professional plumber regardless. Even experienced DIYers have a high chance of accidentally pushing the clog further into the drain using a drain snake or another tool, so hiring a plumber is the ideal course of action. A professional plumber can use camera equipment to locate and identify the clog, and remove the entire blockage to fix your issue permanently.

Professionals use snakes, hydrojetting, or chemical cleaners to clear blockages effectively without damaging pipes.

Usually it’s fine to leave a toilet clogged overnight, as long as it’s not close to overflowing. In some cases, the extra time may give the clog time to work itself out. For example, if it’s caused by an excess of toilet paper, letting it sit could result in the clog dissolving and you may be able to simply flush it away by the time you wake up. 

Only let it sit though if you have more than one toilet in the home.

The Cornish, NH homeowners’ guide to french drain services

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