How to fix a pipe under a slab?

Author: scraper  |  Last update: Tuesday, September 29, 2026

Fixing plumbing under a concrete slab requires locating the pipe, then choosing between breaking the concrete to repair the pipe, tunneling underneath it, trenchless pipe lining, or abandoning the old line entirely in favor of rerouting through walls and ceilings.

How to fix pipes under concrete slab?

One of the oldest and most common methods for fixing an under-slab leak is by breaking through the foundation. In this process, professionals will use tools like jackhammers to access the pipe, repair the damage, and then restore the foundation.

Does insurance cover broken pipe under the slab?

Does homeowners insurance cover slab/foundation leaks? If the slab leak resulted from a pipe that suddenly burst, homeowners insurance may pay for the removal and replacement of the slab. Foundation leaks caused by a flood generally won't be covered by a standard homeowners policy.

Can I do hydro jetting myself?

Yes, you can DIY hydro jetting by attaching a specialized sewer jetter hose and nozzle kit to a high-pressure washer, but it requires caution to avoid damaging pipes or injuring yourself. While effective for clearing grease and roots, it is generally recommended to hire a professional, especially for older or clay pipes.

How do plumbers fix leaks under slabs?

They will purge the faulty section of pipe, replace it with new material and test the line to ensure that the leak has been fixed. Qualified foundation repair specialists have the experience and equipment to tunnel as far as 100 feet beneath an affected concrete slab once they've confirmed the location of the leak.

How to Repair a Sewer Pipe Under a Concrete Slab | This Old House

How to tell if a pipe is leaking under a concrete slab?

Remember, the symptoms of a slab leak include but are not limited to:

  1. Unexpected spikes in your water bill.
  2. Sounds of water running when all water is turned off.
  3. Inexplicable warm spots on the floor.
  4. Damp flooring or pooling water.
  5. A noticeable decrease in water pressure.
  6. Musty odors throughout your home.

Does flex seal really work on water leaks?

Yes, Flex Seal products (spray, tape, and glue) generally work as a temporary fix to stop water leaks on many surfaces, including gutters, PVC, and PVC pipes. It is highly effective for low-pressure leaks but is largely designed as a temporary patch rather than a permanent plumbing solution.

What is the number one killer of plumbers?

PMRs for malignancies of the stomach, kidney, brain, and lymphopoietic system were also elevated, especially among plumbers. Chronic rheumatic heart disease, emphysema, liver cirrhosis, and all external causes of death were the major non-cancer causes with significantly elevated PMRs.

Can I rent a jetting machine?

It's easy with high pressure water jetting equipment rentals from NLB. We have locations across the USA, with the industry's largest fleet of rental units and many of our popular accessories.

Why pour salt down the drain every night?

Pouring salt down your drain at night is a popular DIY plumbing trick used for routine maintenance. The goal is to take advantage of the salt's coarse texture and natural moisture-absorbing properties.

What not to say to a home insurance adjuster?

Avoid making guesses or unsupported statements about what caused the damage to your property. Speculating can lead to inaccuracies in the adjuster's report, potentially affecting your claim.

Can I file an insurance claim for a leaky pipe?

Homeowners insurance may help cover damage caused by leaking plumbing if the leak is sudden and accidental, such as if a washing machine supply hose suddenly breaks or a pipe burst. However, homeowners insurance does not cover damage resulting from poor maintenance.

Who pays for leaking pipes?

Homeowners. If you own your home, you're responsible for all the pipes within the property boundary which join up with the stopcock for the mains pipe. If you have a leak in your pipes, you have to fix it.

What does Coca-Cola do for concrete?

Coca-Cola does three main things to concrete: it slows down the curing process (acts as a retarder), etches the surface to expose decorative aggregate, and removes tough stains. This happens because of the soda's high sugar content and phosphoric acid.

Can you reroute plumbing in a slab foundation?

Yes, rerouting your pipes is a good idea — especially if your existing damaged pipes are underneath your slab foundation. You'll avoid breaking the concrete slab to conduct repairs, and the location of your new pipe makes future plumbing repairs easier.

Can I use a pressure washer for hydro jetting?

Connect the sewer jetter kit to your pressure washer. Insert the sewer jetter hose about a foot into the drain. Turn on your pressure washer and hold the spray wand handle while slowly moving the hose down the drain.

Can hydro jetting damage old pipes?

Older pipes may have corrosion or structural weakness that could be exacerbated by the high pressure of hydro jetting. A professional plumber will use tools like cameras to inspect the inside of the pipes, looking for cracks or damage.

How much is it to rent a pressure washer at Lowe's?

Power washer rental cost

The cost to rent a power washer is $100 to $250 per day for a unit that uses hot water for heavy-duty cleaning jobs. Pressure washer rental prices are $45 to $100 per day for a cold-water gas or electric unit. Home Depot and Lowes rent power washers for about the same cost.

What plumbers wish you knew?

10 Things That Your Plumber Wishes You Knew

  • Water meter and a leak. One thing you should learn to do is check for a leak. ...
  • Septic lines safety. ...
  • Don't trash the toilet. ...
  • Water around the toilet. ...
  • Flush that water heater. ...
  • Vacation water shut off. ...
  • Know your limits. ...
  • Garbage disposal care.

What are the fatal 4 in construction?

OSHA's "Fatal Four" are the leading causes of death in the construction industry, responsible for over 60% of worker fatalities. These hazards are Falls, Struck-by incidents, Electrocutions, and Caught-in or -between accidents.

What do local plumbers charge per hour?

On average, plumbers charge $75 to $150 per hour for standard plumbing repairs. Emergency plumbing services and after-hours visits typically cost more due to urgency. Many homeowners prefer flat-rate pricing because it provides cost transparency.

How long will Flex Seal last on concrete?

Q: How long will it last? A: Depending on the environment, coats added, and maintenance, many people have found Flex Seal will last for years without cracking, peeling, or losing any of its strength or sealing properties.

How do plumbers find hidden leaks?

Plumbers use a mix of forensic deduction and specialized technology to locate hidden leaks without tearing apart your home. They generally start by assessing the property for water damage and then utilize advanced tools to pinpoint the exact source.

What is the best sealant for leaking pipes?

The best sealant for a leaking pipe depends on the type of leak. For holes and cracks, epoxy putty is ideal, as it hardens into a waterproof patch. For leaking joints or threads, use PTFE (Teflon) tape or pipe thread sealant. For quick emergency fixes, a silicone sealing tape or leak spray works best.

← Previous article
Does an air filter affect AC in a car?
Next article →
Can termites crawl up concrete?