Under the slab
Copper lines under concrete foundations, common in post-war Valley homes.
Emergency plumber at your door in 60 to 90 minutes across the San Fernando Valley, Santa Clarita & LA CountyEmergency response in the Valley & LA County
Sewer & trenchless
Plumbing repair

Slab, wall & underground leaks
Hidden leaks quietly raise water bills, damage floors and weaken foundations. Professional locating equipment pinpoints where the water is escaping, under the slab, inside a wall or in the yard, so the repair opening is as small as possible.
Leak detection
Many leaks never show up as a puddle. These are the clues that usually point to one.
How it works
We start by confirming there is a leak and isolating it: is it on the hot or cold side, inside the house or on the service line from the meter? Pressure testing narrows the search to the affected line.
Then locating equipment pinpoints the leak itself. Depending on the situation that can mean acoustic listening to hear water escaping under concrete, pipe locating to trace the line's path, or moisture readings to map where water is spreading in walls and floors.
Once we know where it is, we explain the repair options: a spot repair through a small opening, rerouting the line, or repiping a failing section. Slab leaks in older Valley homes, for example, are often better solved with a reroute than by breaking the floor.

Our process
Clear steps, explained before anything happens, so you always know what comes next.
Meter checks and pressure testing confirm and isolate the leaking line.
Locating equipment finds the leak with minimal disruption.
Spot repair, reroute or repipe, explained with pros and cons.
The fix is made and the system is pressure tested again.
Good to know
These are the leak locations we find most often in Los Angeles homes and buildings.
Copper lines under concrete foundations, common in post-war Valley homes.
Supply lines and fittings behind showers, sinks and appliances.
The water line between the meter and the house, often galvanized or aging copper.
Toilets that run silently, dripping valves and failing supply hoses.
FAQ
Straight answers to what homeowners ask us most. Call if yours is not here.
Call 818-538-4958Common signs include warm spots on the floor, the sound of running water, cracks in flooring, and a water meter that moves when everything is off.
Not always. After pinpointing the leak, rerouting the line through walls or the attic can avoid breaking the slab. We will explain both options.
Yes. A running toilet or a small underground leak can waste a large amount of water without any visible sign.
It depends on your policy. Damage from sudden leaks is often treated differently from gradual leaks. Check with your insurer; our documentation can support a claim.
Customer reviews
Reviews come straight from our Google Business Profile.
Posted on Google![]()
Theodore NilssonTrustindex verifies that the original source of the review is Google.
New Flow came out to my mothers house in Reseda and was able to clear the main line blockage. They were there within an hour and had very reasonable pricing. While there they identified another problem with the pipping(it is a 100 year old house lol) and came up with an option to replace some of the pipping. Definitely will be using them again for any problems down in the valley.Posted on Google![]()
ValerieTrustindex verifies that the original source of the review is Google.
Whenever something goes wrong at our North Hollywood condo property, Art answers the phone day or night, which is why New Flow Plumbing has handled our plumbing since the place was built. Just last week a huge problem hit at 10:00 pm with all the tenants stressing out, but they had someone walking through the door in twenty minutes to get it taken care of. They show up ready to work seven days a week for the small stuff and the emergencies alike, so I always know we are covered.Posted on Google![]()
MichaelTrustindex verifies that the original source of the review is Google.
Had a sewage back up at a unit and Art was able to take care of my problem. Due to it being an older house it had quite significant problems (old piping, no clear out,etc). He took care of the clog, add clear out, and also discovered the toilets that were installed were incorrect ones since forever and replaced both toilets as well. He also gave me advice on what he would do with the current drainage problem and what he would do temporarily, and or the future for my piping. Was very reasonably priced. 100% satisfied with the service he provided.Posted on Google![]()
Cherrie !Trustindex verifies that the original source of the review is Google.
Shower was way too cold. Looked at the tank and could tell it was completely done, so we reached out to New flow to fix the plumbing in Granada Hills. The tech got the new hot water heater put in and even cleaned up some sloppy copper fittings left behind from our previous remodel so everything lined up straight. He was wrapped up and out the door by 3p, and the hot water was running before he left.Posted on Google![]()
Ava-Lynnette De La TorreTrustindex verifies that the original source of the review is Google.
Water was backing up into both my toilet and bathtub from a main line clog. A few plumbers gave weird replies, including one guy who threw out a random quote without even checking the pipes. I usually handle small things myself, but I needed real help here. Art came in and mapped out the whole line, running a camera to show me the blockages on the screen. He pushed past 60 feet clearing tree roots and debris, explaining the fix as he went. The final bill matched his quote. Thanks to them I can finally take a shower.Posted on Google![]()
Melanie HernandezTrustindex verifies that the original source of the review is Google.
Great work from the best plumbers in the valley. I had a pretty big job done. They replaced the main water pipe out to the street. It was completed on time and they kept me informed during the down time (waiting for the city to approve the permit.) I would use them again. They are pleasant to work with.Posted on Google![]()
Taye325Trustindex verifies that the original source of the review is Google.
If you need a reliable plumber in Valley Village, save their number right now. Our new tenants moved into our rental last weekend and immediately hit us with a no hot water text. Found New Flow on Google, liked what I saw on their page, and gave them a call. Arman sent someone out just a few hours later. We looked at the old twenty year unit and agreed a full replacement made the most sense. They knocked it out the exact same day, saved my weekend, and kept the tenants happy. Already passed his name to a buddy of mine who hired him shortly after.Posted on Google![]()
Ava LamisonTrustindex verifies that the original source of the review is Google.
My parent's toilet was leaking and after messaging different places, I told my parents this place could fix our problem. Arman was the one who helped us out and after talking to him about a possible broken wax ring, he found the actual problem, roots in our pipes. He hydrojetted the roots and installed something to help keep the roots from growing for the next few years. So if you're have problems related to pipes, my family and I highly recommend coming here.Posted on Google![]()
tal abutbulTrustindex verifies that the original source of the review is Google.
We have been calling New Flow for plumbing services ever since they warned us six years ago that our ancient drain pipes were on their last legs. When the system finally failed, we shopped around for bids on a full repipe. Every single plumber gave us quotes without stepping foot under the house, except them. The team crawled under there, filmed the pipes, and showed us that our water lines were still completely fine. Arman gave us a fair quote for just the drains, and his crew finished the work in one day. Hard to find contractors this upfront and genuine.Posted on Google![]()
ChloeTrustindex verifies that the original source of the review is Google.
I cannot compliment New Flow Plumbing enough. They were recommended by our selling real estate agent for a sewage line inspection. They came out quickly, and Arman was very professional and polite right away. He was able to service the sewage line, provide thorough, expert knowledge, and give us recommendations. The pricing is excellent and fair, and I would definitely recommend using their services again. The HD video was provided for our own viewing, and it was emailed to us within hours of the visit. Overall a very enjoyable experience. 5 stars does not do it justice. Thanks again!!
Keep exploring
Call 818-538-4958 and we will help you find out where the water is going.