"Upfront flat-rate pricing, honest work, and a licensed Texas Master Plumber who answers the phone himself — proudly serving Grand Prairie, Arlington, Cedar Hill, Mansfield, and Duncanville for over 40 years."
Flat Rate Plumbing Company is built on a simple idea: you should know the full price before the work begins. Every job starts with a single, comprehensive estimate — covering diagnostics, labor, and parts — so there are no surprises when the work is done and no meter running while you wait.
Owner and master plumber Roy Adams has served Grand Prairie and the surrounding communities since 1984. When you call, you talk directly to Roy — not a call center or a dispatcher — and you get the same honest, careful work that has kept customers calling back for decades.
Meet Roy AdamsFrom water heaters and leak repairs to faucets, toilets, drains, and valves, Flat Rate covers the indoor and outdoor plumbing that Grand Prairie homeowners rely on — all with the same upfront, flat-rate pricing.
New water heater installations, replacements, and repairs — sized right and done right, so you get dependable hot water without the guesswork.
Learn More →Kitchen, bathroom, and utility faucets installed or repaired — stopping drips and restoring clean, reliable flow at every fixture in the home.
Learn More →From running and leaking toilets to full replacements, we handle the repair or install cleanly and correctly the first time.
Learn More →Fast, thorough leak repair to protect your home from water damage — we find the source and fix it, not just the symptom.
Learn More →Shower and tub valve installation and repair — fixing temperature trouble, drips, and worn cartridges so your bath works the way it should.
Learn More →Clearing sink, lavatory, and drain stoppages quickly — getting your kitchen and bathrooms draining freely again with minimal disruption.
Learn More →Roy Adams has been a licensed Texas Master Plumber since 1984, personally serving Grand Prairie and the surrounding communities for over 40 years. That depth of hands-on, field-tested experience is something few plumbers in the area can match — and it shows in the quality and care of every job.
Roy runs the business the way plumbing ought to be done: when you call, you reach the master plumber himself — no dispatch center, no middleman. Every job is quoted with upfront flat-rate pricing, so you approve one comprehensive estimate covering diagnostics, labor, and parts before any work begins. It is the straightforward approach that has earned Roy decades of loyal, repeat customers.
"Roy Adams has provided services for me during the past 25 years — slab leaks, water heater installation, faucet and sink installations, disposal replacement, toilet replacements, and more. He is trustworthy, reliable, and very knowledgeable in all aspects of plumbing. Roy services my home and also the homes of my daughter, son, and father-in-law, and we have never been disappointed through multiple annual calls. I have 100% confidence in Roy's work and advice."
"I rarely give five stars unless well deserved but Flat Rate Plumbing is by far the best plumbing company that I have ever hired. Flat Rate provided professional service, the plumber was extremely knowledgeable, and friendly. If you are ever in need of an awesome plumbing company please contact Flat Rate Plumbing — you will not be disappointed."
"Roy has done plumbing jobs large and small on our house for 20 years. He is prompt, reliable, does great work and backs up his work always. We 'shop small' to support local contractors and businesses every chance we get, and Roy is our go-to for all plumbing needs. Highly recommend him and his work."
Answers to the questions Grand Prairie-area homeowners ask us most.
It means you know the full price before any work begins. Roy gives you a single, comprehensive estimate that covers diagnostics, labor, and parts, and you approve it up front — so the number you agree to is the number you pay. No hourly meter running, no surprise add-ons at the end.
Yes. Flat Rate Plumbing is owner-operated, so when you call you speak directly with Roy Adams, the master plumber — not a dispatch center or a receptionist. You get straight answers from the person who will actually be doing the work.
Yes. Roy Adams is a licensed Texas Master Plumber (License M-14388) and has been in the trade since 1984 — more than 40 years of hands-on plumbing experience serving the Grand Prairie area.
Flat Rate handles a full range of residential plumbing — water heater installation and repair, plumbing leak repair, faucet and fixture work, toilet installation and repair, garbage disposals, shower and tub valves, kitchen and bathroom sinks, shut-off valves, outside hydrants and frostproofs, boiler drains, and sink and lavatory stoppages. If it involves your home's plumbing, it is worth a call.
Absolutely — water heaters are one of our most-requested services. We install and replace new units and repair existing ones, helping you choose the right size and type so you get reliable hot water for years to come.
Flat Rate Plumbing Company is based in Grand Prairie and serves the surrounding communities, including Arlington, Cedar Hill, and Mansfield. If you are not sure whether your address falls within our service area, give us a call — we are happy to confirm.
Call Roy at (972) 641-4837, email flatrateadams@sbcglobal.net, or fill out the form on our Contact page. Let us know what is going on with your plumbing and we will get you a clear, upfront flat-rate estimate.
Locally owned and operated from Grand Prairie, Texas — Flat Rate Plumbing Company serves Grand Prairie, Arlington, Cedar Hill, Mansfield, Duncanville, and the surrounding area.
Flat Rate Plumbing Company proudly serves Grand Prairie plus the surrounding communities of Arlington, Cedar Hill, Mansfield, and Duncanville.
Texas Master Plumber • Lic. M-14388 • Upfront Flat-Rate Pricing • Serving Grand Prairie, Arlington, Cedar Hill, Mansfield & Duncanville Since 1984
