Clear Communication
We explain the diagnosis and service options before work begins.
Gaithersburg · Serving Maryland 30+ Years
WSSC-licensed and insured technicians, upfront pricing with financing, and warranties in writing for Plumbing Repairs, Drains, Water Quality, and 24/7 Emergencies for Montgomery, Carroll, Howard and Frederick Counties and parts of NW Washington DC.
Your Local Gaithersburg Plumbing Contractor
Plumbing problems don’t keep business hours. Mallick Plumbing & Heating has been the reliable choice across Gaithersburg and Montgomery County for more than three decades — call (301) 804-6759 and reach a real person, day or night.
We’re small enough to give you personalized attention and large enough to handle whatever your home or business needs.
Tell us what you need — we’ll be in touch fast.
Get To Know Mallick
Meet the people behind the work and see the care we bring to your home or business.
Watch our story on YouTube
We explain the diagnosis and service options before work begins.
Someone answers around the clock — nights, weekends, and holidays included.
One year on installations, 30 days on repairs. Backed in writing, every job.
Maryland’s Choice For 30+ Years
Same-day availability throughout Montgomery, Carroll, Howard and Frederick Counties and parts of NW Washington DC. Call for 24/7 emergency service.
Whatever the house throws at you, one WSSC-licensed team handles it — with HD sewer cameras, sonic leak detection, hydro-jetting, and trenchless repair when the job calls for it.
Additional Services We OfferRepairs, repiping, fixtures, and leak detection for every part of the house.
HD sewer cameras, hydro-jetting, and trenchless repair to clear it and keep it clear.
Tank, tankless, and hybrid installs and repairs — sized right for your home.
Softeners, filtration, and testing so what comes out of the tap is worth drinking.
Why Gaithersburg Calls Mallick
Mallick Plumbing & Heating has been the plumber Montgomery County homeowners call for over thirty years. What started as a small Gaithersburg shop now serves homes and businesses across the region, with a person answering the phone at any hour.
Every technician is WSSC-licensed, certified by the Washington Suburban Sanitary Commission that runs water and sewer service across Montgomery and Prince George's County. We're members of the Plumbing-Heating-Cooling Contractors Association (PHCC), Quality Service Contractors (QSC), and Water Quality Association, and we're Rinnai ACE Pros. The person at your door works for us.
We explain your options before any work begins. Installations carry a one-year warranty and repairs carry thirty days, in writing. Financing and payment plans are there for when a water heater fails at the worst possible moment.
Mallick Plumbing & Heating handles residential and commercial plumbing. From repairs and drains to water heaters and water quality, our team helps homeowners, businesses and property managers keep their plumbing working.
We use boot covers, drop cloths and protective measures to care for your home or business while we work. Our team treats your space with respect and cleans up the work area before leaving.
Equipment, Not Guesswork
HD Sewer Cameras
See inside the line before anyone digs, so the diagnosis isn't a guess.
Sonic Leak Detection
Finds water behind a wall without opening the wall to look for it.
Hydro-Jetting
Scours the drain properly instead of punching a hole through the clog.
Trenchless Repair
Repairs a sewer line without excavating the front yard to reach it.
Work We’ve Actually Done
Mallick Plumbing & Heating replaced a Frederick, Maryland facility's failing 25+ year old booster pump system with new pumps, connections, and controls, restoring consistent water pressure and long-term reliability.
Before
After In Their Words
4.9
from 2,979
Google reviews
Eric and Nick did a wonderful job.
Very thorough and provided detailed explanation of what was needed to get our garbage disposal up and running.
Louise Wilson
Google review · Gaithersburg, MD · August 12, 2026
Abbas and Koli were great technicians.
Quickly diagnosed the issue, thoroughly explained everything, and gave me a few options to move forward. I've had great experiences working with Mallick, highly recommend.
Chrissie Schenkel
Google review · Gaithersburg, MD · August 12, 2026
Fred and Luka were great!
They took the time to find the issue as well as helping me get opinions on future concerns as a new homeowner! Real experts and will work with them again!
Elijah Wadsworth
Google review · Woodbine, MD · August 11, 2026
Abbas came to our house for an emergency repair on a Saturday.
He was courteous and kind, he didn’t rush, and he worked hard to fix our problem and thoroughly investigate. It was hard to find a plumber who could do this on a Saturday at the last minute, and we appreciated Mallick’s and Abbas’s willingness.
Raj Nayak
Google review · Gaithersburg, MD · August 8, 2026
Abbas and Koli were fantastic.
They quickly identified and resolved our issue, and did a check to ensure there were no other sleeping issues. They were a pleasure to work with, respectful, and kind.
Kelley Barnaby
Google review · Gaithersburg, MD · August 5, 2026
Abbas Rahimiari was exceptionally professional, looking at our two plumbing problems, describing the underlying issues, fixing one immediately and explaining options on the other. Courteous, clear and efficient. And knowledgeable.
Gordon Schatz
Google review · Gaithersburg, MD · August 3, 2026
I received great service from both Ikem and CJ today.
They quickly identified the leak and fixed the issue. They also did a great job replacing some valves that needed replacing. They were very experienced and efficient. I have used Mallick several times and have always been pleased with their service.
Melissa Cavuto
Google review · Gaithersburg, MD · August 3, 2026
I had a wonderful experience with Billy.
He was amazing and he was able to fix my issue with no concerns! 10/10! Thank you Billy.
Mia Barker
Google review · Gaithersburg, MD · July 31, 2026
Abbas and Erick were professional, knowledgeable and kind.
They inspected and guided me to make safe choices with my range that had a gas leak.
Andrea Huerta
Google review · Gaithersburg, MD · July 30, 2026
Excellent service and support from William Clem and Malick Plumbing.
Had a pinhole leak in a water service line. Found and fixed the problem … thanks so much.
Daryle Seckar
Google review · Gaithersburg, MD · July 30, 2026
Abbas and Bryan installed my new water heater.
There was a leak in my furnace and they fixed it also! The job was perfect. They had to install vents that were well done. They left no trace and the house was completely clean. The new water heater works like a charm. HIGHLY RECOMMEND this team and Mallick.
Janet
Google review · Gaithersburg, MD · July 28, 2026
Roberto and Adelson were great to work with, efficient, and answered all questions. Top service and repair of water heater!
Jonathan Daly
Google review · Gaithersburg, MD · July 28, 2026
Kyle was so helpful in helping my husband and I fix the water pressure in our house. Kyle was very well versed and experienced, providing great options for future improvements to water filtering. I would highly recommend his services to anybody struggling with plumbing issues.
Azusena Herrera Tapia
Google review · Gaithersburg, MD · July 27, 2026
Luis and Luca thank you both so much for all of your hard work and awesome professionalism! Look forward to working with you both again.
R
Google review · Frederick, MD · July 24, 2026
Andrew did a fine professional job!
We are very please with the installation of our new water heater. It was made easy and painless.
Albert Z. A.
Google review · Gaithersburg, MD · July 24, 2026
Abbas and collie were friendly professional and kept me informed throughout their work. They also did a great job cleaning up after themselves
jeff rosenbaum
Google review · Gaithersburg, MD · July 24, 2026
Oscar was the tech who replaced my faucet and replaced a pipe.
I am extremely happy with the Marrick Co. starting with the office who responded quickly to my texts and phone call.
B K
Google review · Gaithersburg, MD · July 23, 2026
Abbas and Ikem were here to help my swimming pool gas heater and did a great job. Very professional and prompt. I highly recommend them.
Mir K. Ali
Google review · Gaithersburg, MD · July 22, 2026
Mallick Plumbing always serves us well.
Eric B has saved us in two emergency situations (one on Christmas Eve, and one on a weekend) and is always knowledgeable, helpful, and thorough. We appreciate the help!
Liza Maciorowski
Google review · Frederick, MD · July 17, 2026
Abbas & Kollie are the best.
They are very nice, respectful and know their job/work really well. Abbas made sure that the problem.is fixed! They have a very good interaction with us.
Ron Cajigal
Google review · Gaithersburg, MD · July 16, 2026
Andrew Johnston was fantastic.
He was fixed both issues - guest bathroom water pressure and leaky washer hose valve, even taking time to explain things as he checked it out. He was timely, efficient and pleasant. I highly recommend Mallick plumbing and if you're lucky enough to get Andrew he is committed to fixing the issue.
Melissa London
Google review · Gaithersburg, MD · July 15, 2026
Common Questions
The things Gaithersburg homeowners ask us most — the shut-off valve one is worth reading before you need it.
Still Stuck?
Talk To A Plumber
(301) 804-6759Someone picks up 24/7 — nights, weekends, and holidays included.
In a plumbing emergency, shut the water off first, then call us. The main valve is generally located where the water supply enters your home. Check that yours turns smoothly and shuts the water off completely — valves fail over time from age and calcium buildup, and you don't want to discover that mid-emergency.
Your whole household depends on it, so sizing matters. Common warning signs that yours is failing include rusty-looking water, bad smells, dingy laundry, leaking, and strange noises. We repair and replace both tank and tankless units and will size the right model for your home.
A well-maintained system is far less likely to surprise you with an unexpected failure. Alongside regular professional maintenance, inspect your plumbing regularly — spotting a problem early helps prevent further damage.
Install water-conserving fixtures and appliances, have maintenance performed to catch hidden leaks, and lower the water level in your toilet tank. More than a third of the water used in the average home goes through toilets, so that last one adds up with every flush.
Yes — 24/7, throughout Montgomery, Carroll, Howard and Frederick Counties and parts of NW Washington DC, including nights, weekends, and holidays. Call (301) 804-6759 and you'll reach a real person.
One year on installations and 30 days on repairs, in writing. We're WSSC-licensed and carry insurance, and we're members of PHCC and QSC.
Where We Work
Montgomery, Carroll, Howard and Frederick Counties and parts of NW Washington DC. Tap a city on the map for local plumbing, drain and water heater service.
Not sure whether you’re inside the lines? Call (301) 804-6759 — we answer 24/7 and will tell you straight away.
Members of the Plumbing-Heating-Cooling Contractors Association (PHCC), Quality Service Contractors (QSC) and Water Quality Association. Rinnai ACE Pros and a TOTO factory-trained plumbing company.
30+ Years
Serving Maryland
WSSC Licensed
Washington Suburban Sanitary Commission
Locally Owned and Operated
Gaithersburg and Woodbine, Maryland