Tri-Valley Plumbing is still our go to plumber for all our needs. Dennis is meticulous with all his work and he is on time every time. He was at our home a couple of days ago to check on a possible water leak and to pull annual maintenance on our water heater. If you want something done right call Dennis the owner of Tri-Valley Plumbing you will be happy you did. read more

I called and got an appointment for two days later to fix a plugged up sink drain. Paul came out and was great to work with. He came within the offered time frame, listened to me, asked some questions and checked out the situation. Then he got to work and cleared the clogged drain. Things got more serious when he tried to take his snake back out but it was hung up on a tree root that had gone into the pipes. Instead of making it worse, the owner of the company personally came out and they worked together as a team to resolve the problem, which wasn't their fault, within an hour. I live in a condo and they know the building well, so they new how to handle things. Thanks, Paul, you made my stressful situation better. I have used Valley Plumbing before to replace a toilet and will use them again in the future. Support your local business! read more

Dennis is extremely detail oriented, thorough, and does amazing work. He prioritizes high quality work and it shows with the final product. There are no shortcuts on his jobs and does everything the right way, even if it means it takes more effort. He loves what he does, has a great attitude and is a real pleasure to work with and talk to. I will continue to use Dennis for all of my future plumbing needs. read more

I found Dennis on Yelp and I am happy I did. I was adding a master bathroom to my house which consisted of adding copper lines, wastes, installing a whirlpool tube, and then installing all of fixture finishes. Dennis did an amazing job at my house. He was responsive, professional, took pride in his work, gave great recommendations, executed, and was fun to work with during the process (I remember he quoted Beyoncé one day....haha....to the left to the left.....haha). He always went above and beyond at my house and did extra work without charge. All of these qualities are hard to find nowadays. I look forward to working with him in the future. read more

Tri-Valley Plumbing - Dennis installed all of the plumbing fixtures as well as completing all of the in-wall copper and waste lines. - Plumbing Near Me

Tri-Valley Plumbing gave us a far estimate to add a gas line for gas cooktop. They were able to do the job the next day. Showed up on time and all workers were courteous and got right to work. Cleaned up after themselves and finished within a quick amount of time. John, thank you and your team for completing our project so quickly. read more

Needed to replace a water heater. They installed without issue. Had some corroded unions where the water softener was. They replaced as a courtesy. read more

I was in the middle of a remodel project and needed a plumber at the last minute. I phoned Dennis, the owner, and explained my problem and he came by my house immediately! He put me at ease and told me the valve installations would be no problem. Dennis is reliable, honest, trustworthy and does excellent work. I could not be happier with the job he did. I already have him scheduled to do another job for me moving the tub drain! Do not hesitate to call Tri-Valley Plumbing for any job you have. you will not be sorry. Make sure you get Dennis at (925) 556-5511 because there are plumbing companies with similar name. read more

Called this service after my neighbor across the street recommend Dennis. Got an answering machine and left them a msg requesting a call back. It's now the following day and still no call back. Ended up with a different plumbing company to work with so they need not call me back anymore. I had heard good things from my neighbor but I can't say the same about his promptness in call backs. Didn't think the other people leaving reviews about not returning calls were referring to this Tri-Valley company until I called their number (925) 556-5511 yesterday (Monday) at around 10:20am and had the same experience. read more

GREAT Yelp find! Trina and Dennis are fantastic. They talk you through your options sensitive to the fact that dollars are tight. They are also reliable and on time. I had a leaky kitchen faucet and a problem with a garbage disposal. So far, so good. I highly recommend Tri-Valley Plumbing! read more

I am new to the area and needed a couple of simple plumbing tasks completed before moving in. My Realtor recommended Tri Valley. I called 3 times and the never called back. read more

We used Tri-Valley Plumbing for our broken garbage disposal. I would definitely use them again! Pros: -quick quote over the phone - simple -same day service -on time -polite and got the job done quickly -super nice woman on the phone to set up appt and pay Cons: -didn't look professional... shorts and a baggie, sweated through t-shirt -had to wait for a call in order to pay over the phone because he couldn't take my payment in person read more

Dennis did a great job on a tricky plumbing problem. Our shower fixture is old and the parts are not easy to locate. He worked with a local supplier, came out a number of times to try and find the perfect fit. He was great to work with, fast, very reasonably priced, and found the exact parts needed to get us back in working order. We will definitely use Tri Valley Plumbing again! read more

Dennis is very responsive, came on time, assessed our plumbing problems and worked to resolve them. While working on a different problem he and his assistant, Giovanni, found a leak in the toilet under the house. The cost was reasonable. He and Giovanni are respectful of your home. Trina was helpful in scheduling appointments. He offered to talk to my contractor to resolve the final plumbing issue that requires a wall to be opened to resolve. I am very happy with the communication and service, and will call Dennis again if needed. read more

I didn't use them because my issue turns out to be more a handyman issue but the woman I spoke with was so friendly and even recommended one. I will call here if I ever need a plumber Excellent customer service! read more

We need a plumbing contractor to fix several toilet problems, a leaking faucet in the bathroom, and to identify a leaking from celling. Again, I searched the Yelp and decided to call Tri-valley plumbing. Trina and Dannis are very good team. Trina answered the phone and asked different questions for trouble shooting. After talking to her, I feel comfortable that I find a good contractor. Dennis arrived on time, fixed all the problems within 2 hours. He is a honest, professional, experienced contractor. I'm happy about his work. I highly recommend this company and I'll call them if we have any plumbing issue in the future. read more

Dennis is the first person in years who could fix the air hammer stuck in the pipes of my mom's back yard! We used to turn on the sprinklers and the entire house would shake. After Dennis took a look at the propertry, all of our pipes, etc. he knew exactly what he needed to do, fixed it, and no more air hammer!! He is AMAZING. He also found a leak under a toilet that came up in an inspection report and fixed it. He is very professional, his staff is very professional and I wouldn't use anyone else. Next time you have anything going on with your pipes, call Dennis!! He is the best! read more

Dennis is a great. I have been using Dennis with Tri-Valley Plumbing for over 15 years. Very friendly, on-time, and does quality work. I highly recommend him for all your plumbing needs. read more

I haven't used their services, but I think they deserve a good review. These guys are great. I had a bathroom remodel done by a contractor that left a leaking pipe (I tried to find him on yelp to leave a bad review, but apparently he is not here...). He could not find the leak. I called Tri Valley and they answered the phone immediately. They were busy in another site, but would stop by that afternoon. Unfortunately, I called it off because I found the leak and fixed it myself. I would definitely call them again in the future if I need. read more

Man this guy is awesome, Dennis, the nicest guy I have ever met, came last minute. He got the job done fast and even ran to the hardware store for us (on his own time) because we needed a whole new faucet set. GOOD PRICES, FAST, and the NICEST guy I have ever met. I would not recommend ANYONE else!! TRI VALLEY PLUMBING !!!!!!!!!!!!!!!!!!!!!!! read more

Had the water main break near the front of our home and Dennis and his apprentice, Giovanni did did an outstanding job of quickly and efficiently fixing the problem. Would highly recommend Dennis and his team for any plumbing issues you may have. read more

Dennis and Giovani were a pleasure to deal with as they re installed our dishwasher and put in a cut-off valve to the appliance. Dennis initially came out to help us when we came home to a dishwasher that had been linking while we were on vacation. he kindly sourced the issue and repaired the leak at no charge. Just asked to do the install and the valve when we had floors repaired. Dennis got rid of the crappy hoses that came with the dishwasher and replaced them with heavier and more durable ones. He explained that the originals become to brittle and are not worth the time to install originally. They were not in a rush and took their time, checking and testing everything so we knew that our new floors would be safe. Dennis and his apprentice Giovani were very friendly and professional and are highly recommended by us. Dave and Dawn read more

Dennis has been my plumber on a lot of jobs in the past 17 years and has always been into what new out there and what things people want in the plumbing world. If you need a plumber Dennis is the guy to call Thanks Dennis read more

Dennis and his crew did a great job installing a gas line for my new stovetop and plumbing for my new sink. I couldn't be happier with the service provided. Thank you! read more

Just wanted to write an updated review to let Dennis know how grateful we are for his help. My husband noticed yesterday that our water heater looked like it was leaking (it is an old one that has been here for a long time). I called Tri-Valley plumbing and Dennis came out right away to assess the situation and give us our options about replacing it. When he came here to replace it we were having some painting work done by another contractor and he noticed that there was a leak in one of the ceilings. Thank goodness Dennis was here! The painter went and got Dennis and Dennis was able to assess and fix the problem within 10 minutes... What a relief! Thanks you Dennis!!!! read more

We agree with all of the wonderful reviews for Tri-Valley Plumbing. We called when we found we had a major water heater leak on a Saturday evening, and Dennis came over Sunday to replace the water heater. This unexpectedly required him to go to Livermore to get the correct size water heater, and despite getting stuck in horrible 580 traffic, he came right back and finished the installation. We recommend and use them again, they were professional and very nice to work with. read more

We love Tri-Valley Plumbing! We had a serious problem with our newly installed water heater. We called Dennis because of the great reviews on yelp and we weren't disappointed with his service! Dennis was very courteous and pleasant to work with. He spent over 6 hours at our home and we felt the bill for all his work was fair and under the amount we thought it would be. Dennis was careful about his work as well as clean and meticulous. My husband and I would highly recommend using Tri-Valley Plumbing for all your plumbing needs! read more

Dennis remains the top reason I always find my contractors on Yelp - he just finished a laundry list of plumbing tasks at my house, did fine work, and charged a very competitive rate. He always goes above and beyond -- this time, he painted our exposed PVC pipes to bring them up to code, and they look better, too. I think this was Dennis's fourth visit to our house in three years (he helped us during a large remodel), and I'm just as impressed as ever. Great work, Dennis! read more

Dennis always get the job done - even in the rain! Repaired water main leak in terrific downpour. Always does what's needed and does it right! Jerry M read more

Dennis was referred by another happy customer and we weren't disappointed. He came out the same day I called him because we had a bad leak in our kitchen. He found the problem quickly and solved it for us right away. He was professional and didn't mind that my kids were an audience. I asked him to install a new faucet which he did beautifully! The wrong one was in the box, so he waited patiently for me to exchange at the store. A nice touch was that he wore booties in our house so as not to dirty the carpet and he even vacuumed up his mess. I would highly recommend him. Professional, reasonable, so nice ! read more

They do not return phone calls at all. I gave up and had to hire another plumber. It's too bad because it's just a matter of getting back to your good customers in a timely manner and they just can't do it. read more

Dennis is as good as it gets, and deserves 5 stars (as does Gio). We bought a house which had received the attention of different plumbers in the past, including the installation of a tankless system of insufficient capacity. Dennis was able to successfully diagnose the issues and he identified an extremely creative solution (utilizing previously abandoned piping to create a recirculation system). He replaced the tankless unit with a bigger, more advanced one and he did it all within his initial guidance. Result, hot water at all faucets within 10 seconds (from 60+) - water saved+irritation gone= one VERY happy family. Thank you Dennis. The work is rock solid, but the thinking was outstanding. read more

Dennis has done a couple of jobs for me - including a very tough repair in my downstairs toilet where a tiny leak in the waste pipe from the upstairs bathroom had caused some major water damage. Like all jobs, one problem leads to another, but Dennis took care of everything - and hooked me up with a new water heater as mine was on its last legs and still got the job done in a day. He also hooked me up with a construction guy to fix my shear wall and a dry wall guy to patch up at the end. I heartily recommend Dennis - he gets the job done, to a high standard and is very reasonable. read more

Dennis has been very helpful in resolving or suggesting how to resolve the plumbing issue at my house. I have called on him several times over the years. read more

We couldn't be more pleased with the work that Tri-Valley Plumbing (Dennis) did for us. When he came to give us a quote - saved us a lot of money advising us to order some parts versus replacing the entire tub and shower fixtures which would have cost us probably at least $600. He was very friendly, gave us a great quote and we were able to schedule the work quickly. I would highly recommend anyone to call for his services -- he really knows his stuff and you'll get topnotch work done. read more

Big thanks, Yelpers, for recommending Dennis! We had a non-functioning water heater. Called and got an appointment within 24 hrs. Dennis came right on time. Only took about 15 minutes to correctly diagnose and fix the problem. Reasonable rates. Personable, knowledgeable and efficient. I am going to have him come back to install a fancy new toilet. Highly recommended! read more

I found this plumber on yelp and I'm so glad I used them! My plumbing issues were pretty minor (leaky kitchen pipe, toilet with a bad seal, leaky shower/tub spout) so I was surprised when another plumbing company came and gave me an estimate of almost $500. I called trivalley plumbing and their estimate was lower so I set up an appointment. Dennis the plumber showed up early and got the job done in an hour. Best of all it cost me under $200 which was even lower than their estimate. They definately know what they're doing and seem to be an honest mom and pop business. read more

Highly recommend Tri-Valley Plumbing(Dennis). Called and got an appointment same day. He fixed all the issues I had from leaky shower to descaling the tankless water heater. He is very professional and efficient. I will definitely recommend Dennis to all my real estate clients and friends. read more

After a different plumber told me the only way to fix my low water pressure in my kitchen faucet was to replace my faucet; Dennis came out and simply replaced a $22 part to the faucet and fixed the problem. Very pleased with the service and rates. Will be using again if needed in the future. read more

We recently used Tri-Valley plumbing to fix the slab leak under our newly renovated kitchen floor and was very pleased with their service. Most of the plumbing companies we contacted were expensive and involved breaking either the tile or cupboard/back splash. Dennis gave creative solutions like putting water heater under the kitchen sink or reroute by extending the false ceiling in my kitchen. It not only ended being reasonable cost solution but also least intrusive. It was little hard to get hold of Dennis but once he makes commitment he was on-time, professional and fast. He also ensured to cleanup after his work. I would use Tri-Valley plumbing again and would recommend to others. read more

Once again Dennis and his crew came through for us. We had a plumbing issue that needed quick resolution and not only did we get the issue resolved quickly but for half the price quoted by local competitors. When you need someone you can trust, call Tri Valley Plumbing. read more