Very happy with National leak services. Competent and on time with when they scheduled the work. They provided great pricing, super fair and upfront about everything read more

Their service is amazing and quick response They have been in business for many years. Bob, the inspector, go above and beyond. Their price is lower than many other companies I've used in the past. I will definitely use them again in the future. read more

Had a natural gas leak at my business. Called national leak and they gave me a fair price. Came with expensive tools and checked everywhere and found 2 leaks. Only thing better would be if they fix the leak, but i was able to find a plumber to fix. Would definitely use again, but I'm hoping I won't have to. read more

National Leak Specialists - Leak was found in between the blue tape - Plumbing Near Me - Sylmar, California

I had evidence of moisture coming up from my concrete slab. I called and. was able to get an appointment the next day. Deagan was very efficient and helpful. He checked all of the possible sources of leak and also the water main. He provided additional info that was very helpful to me on how to proceed with the next steps, even though it was not part of his job. I highly recommend this company and, in particular Deagan. It is refreshing to see honest and hardworking professionals. read more

Absolutely stellar performance!!! These guys found the leak in a matter of a few minutes. They were extremely personable, professional, knowledgeable, polite, and well worth the cost of finding a water leak underneath our house! Thank you. read more

Bob Mulcahey came on my 1 1/2 acre property on 11/9/22. I was impressed the moment he introduced himself. He guaranteed that he would find any leaks on my property that caused me to receive a 2 month DWP water bill that was $4,801.74. My water bill usually is about $1,200 maximum. Bob found that one of my tenants had his toilet running for a long time and was sending 4 gallons a minute to the sewer. I send monthly letters to my tenants asking them to advise me if their toilets are running, faucets are leaking and to check under their sinks for leaks. Unfortunately my tent said well there are no leaks one the floor. Bob checked every square foot of my property. He has been doing leak detection for 35 years. I highly recommend him, he is an expert and really knows what he is doing. He said he can smell water, however, he came prepared to do what was needed to find leaks on my property! He gave me superb service! He even gave me a video of how fast the water was flowing into the sewer from the toilet tank. I don't know how to attach the video of the toilet running. read more

Great job by Deagan and crew. We had a leak in our church sanctuary floor. The crew came out and found the leak. Our floor has a false floor, so they found the leak, marked the area and the plumbers found the leak right where they said. Great job even working through the void. read more

I absolutely recommend Tim & Bob! They were referred to me by a plumbing company that I called that I found online after another company quoted me $5100 for a whole new line (he didn't even do anything, just came out). We had a gas leak and the Gas Co had to shut off our gas. We were without hot water and stove for 6 days. We had one incompetent plumber come out that said he was going to compress the line to find the leak, but didn't. I called another who wanted to charge us $5100 to redo everything! Tim & Bob got our gas back on and referred us to an honest plumber who is going to repair the rest of our issue. Highly recommend these guys! read more

The best in the business will recommend them to my family and friends I called a day before we set up a time for the following day Bob showed up and was honest with the pricing and he even communicated throughout the whole process Very excellent service and very professional. Thank you all read more

Efficient. Kept me posted and in the loop of an eta. worked diligently to find out the specific problem

Bob was amazing very professional and showed up in less than an hour after I called. I highly recommend National Leak Specialists.

I highly recommend National Leak, Bob especially. They have great customer service and they don't charge you more than necessary. Bob had to come over to my house several times to find the leak and each session is several hours long. However he only charged a one time service fee. Bob also came back to check on the leak a week later to make sure that there is not more leaks. Overall, I highly recommend National Leak for anyone who has a leak. read more

I highly recommend Anthony and National Leak Specialists. Anthony was prompt, professional, and with his expertise was able to figure out the source of the leak at my home very quickly. He also came out within 24 hours of initial contact and on a Saturday morning. read more

Bob truly was an angel when we needed one. He was very kind, helpful and honest. And he was in a fantastic mood even though he had every reason not to be that day. Michelle was also always kind and caring on the phone. These two made a very stressful situation much more enjoyable. Thank you!!! read more

ONLY USE THIS COMPANY! I tried four companies who wasted my time and money and this was the most efficient, capable, honest, reasonably priced of all. I don't know them and I am not a relative but I swear I would give them 12 stars. When you have a leak you don't want guess work where to dig or cut concrete and that is what I got with the OTHER four companies. Bob at National knows what he is doing and remodeled 12 houses in the S.F. Valley. He is amongst the best sub contractors out there. I would trust him for any job and in leak detection he is far and away the best. I highly recommend to take the best first. And they are so nice to work with too! read more

I highly recommend Bob Mulcahey and his team at National Leak Specialists. Turns out I had a leak from a PVC pipe under the cement on my back patio. I spoke to a few other companies that didn't want to take the time to explain various detection methods which frustrated me. Bob was prompt to return my call and spent the time to explain a few of the various tools he uses to find different types of leaks in different situation such a water inside, water outside, gas, breaks in electrical lines, etc. This time made me feel comfortable that he was the right guy and they provide emergency service and was over first thing the next morning. I'm impressed with all the equipment he has and used and within sort time he was able to pinpoint my leak to within a few inches. I had plumbers out the next day to rip out the concrete and repair the leak. Once they got to the pipe, the leak was not obvious as it was from a joint that was never glued in the first place. Bob was back at my house withing 30 minutes to help the plumbers pinpoint the leak. All fixed and I couldn't be happier with their service. Their pricing is also similar to the other quotes I received. A big difference is their personal relationship with Goldak, a manufacturer and expert in the detection tools used. Good luck. read more

Honest and reliable company to say the least! The gas company had shut off our gas due to a gas leak. After going through 2 separate companies which failed to detect where the leak was, we were able to find National Leak. They were completely booked for a few days, but promised to get back if they had an opening sooner. As promised, Bob called back that same evening and scheduled to come out the next day. He showed up with all the right equipment and was able to locate not 1, but 2 gas leaks!!!! Thank you Bob! read more

I am a property manager and had a gas leak that caused the gas company to shut off the gas to one apartment; my plumber could not find the source. I called one company and they would not even come out. I spoke with Bob and he was able to get there the next day. He did a lot of testing and did not think there was a leak. Plumber still could not find it. Bob came back out a 2nd time with 2 other people; after thorough testing he still thought no leak and I should contact the gas company. Sure enough the gas company turned the gas back on; seems they made an error when they shut it off the first time. I would highly recommend Bob & National Leak Specialists! read more

Recently was referred by Kirk The Plumber for a leak assessment. I just recommend requesting a quote from them before initiating the evaluation. Seemed expensive. read more

These guys are best service company I've ever hired, they knew exactly what had to be done, they were on time and fixed our problem without any issues. Real pro's... would highly recommend! read more