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Master Plumbing & Mechanical For over 30 years, Master Plumbing & Mechanical has served the Washington, D.C. area, including Montgomery and Prince George's county. Founded by Joe Maier and Billy Silk and rooted in personal, neighborly service, we've built our reputation on recommendations from our satisfied customers.

We've received Angie's List Super Service Awards for both plumbing and drain cleaning every year consecutively, going back to 2007, as well as the Best Plumber award from Best of Bethesda.Our company is fully licensed, bonded, and insured. We offer friendly, courteous service with fast response times, and we accept all major credit cards, for your convenience.
Business details
  • Year established: 1984
  • Licensed
Services
Toilets
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A well-designed toilet will do its job day in and day out, for year after year, but when things do go wrong with a toilet, the problem becomes very noticeable. Even if your toilet is still functioning properly, you may be considering replacing it to cut down on water bills or update your bathroom.
Boiler Installation & Repair
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High efficiency condensing boilers deliver comfort, convenience and reliability. They provide whole-home heating and, when you choose a combination boiler, can also offer water heating in a single advanced system. This smart system delivers comforting warmth as well as enduring quality and lasting peace of mind.
Tankless Water Heaters
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By providing on-demand heating of hot water as it's used in your household, you avoid paying to heat water that sits in the storage tank until needed. Master Plumbing & Mechanical can help you select the right tankless water heater for your home, and provide top-quality installation.
Sewer Line Replacement
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For most homeowners, a sewer line never crosses their mind until a replacement is necessary. It can start with a smell of sewage, wet patches in your yard or slowly draining toilets. The sooner you catch a problem with your sewer line, the easier the repair can be. Master Plumbing & Mechanical offers complete sewer replacement services, including video diagnosis and inspection.
Drain Cleaning & Unclogging
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Drains clog and are hard to clean. This is an unavoidable plumbing issue that every homeowner will experience, some more often than others. Drain cleaners that you buy in the stores can compound problems and result in damage to your pipes, which could cost you more over the long-term.
Reviews (11)
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Dan Fisher
Jun 23, 2022
Very pleased with the work done. I called them to replace two hose bibs/outdoor spigots. They were pleasant on the phone and scheduled me quickly. They charged a fair price and the two plumbers were extremely thorough in fixing the issue. They took their time to explain my options and walk me through the pros and cons of each.
Naga Pannala
Nov 07, 2021
As disappointing because they are quite expensive($150) for their initial estimate which took literally 20 min only to look at to figure out the just brand of the toilet. they do not use that amount towards the actual repair and charge an additional $175 for the repair. Service: Toilet repair
Russell Lacey
May 01, 2021
We purchased a new hot water heater from a plumber who doesn't service what he sells. I did not know that at he time, my bad. In searching for an authorized AO Smith Plumber, I came across Master Plumbing and Mechanical. They were awesome, showing me how to get the service call covered by my AO Smith warranty, coming out quickly even though they didn't do the install.

And once the part needed was received, they were out almost immediately. Jack was our guy, he was timely, polite, professional. I will refer Master Plumbing to others every chance I get.
Davis Giedt
Feb 13, 2021
Master plumbing is a fantastic, reliable plumbing service. We have done extensive work with them, including on our radiator systems, drains, toilets, faucets, and water heater. They are one of the only shops I know of that actually do the work themselves (ie, done by their master plumbers). They are highly knowledgeable and thorough. Services: Water heater installation, Faucet installation, Plumbing leak detection
Elizabeth Atterberry
Nov 10, 2020
This is a GREAT company! Jack came over unclogged the shower/tub drain and was out in a blink of an eye. Great Service - Will use their service for our future plumbing needs. Service: Drain cleaning
Tom Ishida
Dec 23, 2019
When I used this company for my construction projects (back in 2008?) I dealt with Joe Maier, and he was great. I wanted him to do all of my work. Now that they are bigger/older, some of their tech just are so shoddy. Repairs take many trips and charges to fix and one technician always lie about what he did or told me so the office and the schedulers keep charging me more than what I was quoted for.
Sara Anderson
May 08, 2019
Awesome group of plumbers to work with. I wanted to get a gas water heater and hvac up to code that was put in by a previous contractor. It was hard to find a master plumber who would get a permit for work done by a previous contractor. Master Plumber not only educated me regarding safety with gas appliances but made outstanding changes to my system to ensure my home's and family's safety as well as ensure that my appliances were able to get their needed permits.

All of the workers involved were highly personable and trust worthy as well as being a nice group of people. Adrian attention to detail is amazing. I actually at times go downstairs to see the work that Adrian did; it looks so nice and professional that I consider it artwork! Their prices are very reasonable also which is another plus!
Nicholas Sammons
Jan 23, 2019
Called these guys to tighten up a few loose fittings under my sink that were causing a slow leak. The guy they sent out fixed the fittings fine, but in the process, he broke my faucet. He charges me $170 for the fittings, then tells me it will be another $300 for the faucet (about double of what it should actually cost). So I was $170 out and the leak under my sink is now worse. Poor deal. You break something while attempting a repair, you should fix it.
Nichelle Dowell
Nov 09, 2016
I contacted MASTER PLUMBING & Mechanical, Inc. today to schedule service (10/10/16). I was told a little bit of a different story and this caused me to move forward with this review. I originally spoke with someone in their office on July 8 and the conversation was much more helpful and respectful. According to my description of the project, it should cost me $250. to have my basement floor drained cleared so the flow rate improves (slow drain issue only).

I was told today to be prepared since they can't be certain the problem will be fixed with the snake. It may be more involved and exceed that cost. If it is more and I do not wish to proceed THERE IS A SERVICE CHARGE: $60.00. I would have scheduled the appointment today if the service fee wasn't $60.00 and I was informed back in July that they have service fees if the work isn't done at the quoted rate. The customer service wasn't the greatest and I WILL NOT CONTRACT THEM TO UNCLOG THE DRAIN.
Anton Korinek
Jun 10, 2013
We had a team from Master Plumbing inspect our home for problems with water pressure and a water hammer. They arrived timely, gave us a thorough assessment and advised us on a reasonable and economical solution to the problem, without pushing us to do the work with them.
Anton Korinek
Jan 05, 2013
We had a team from Master Plumbing inspect our home for problems with water pressure and a water hammer. They arrived timely, gave us a thorough assessment and advised us on a reasonable and economical solution to the problem, without pushing us to do the work with them. Very honest, pleasant to work with and highly recommended.