Bethesda’s houses have been standing a long time — and that’s exactly the work we know best. Custom Flow Plumbers serves the entire DC metro area from our base in Oxon Hill, and Bethesda is where our older-home experience earns its keep: the median home here was built in 1969, half the housing stock went up before 1970, and whole neighborhoods — Edgemoor, Battery Park, Bradley Hills, Bannockburn — are full of 1950s and 60s houses still running on systems from that era.
Those houses were built well. But cast-iron drains, clay sewer lines, and aging boilers don’t care how well they were installed — they wear out on a schedule, and Bethesda’s are arriving together. We repair and replace them properly, in Edgemoor colonials, Bradley Hills ramblers, and downtown condos alike.
Call (301) 971-4884 — Mon–Fri, 8am–5pm.
What should you look for in a plumber? Experience, knowledge, communication, and work ethic. Our plumbers in Bethesda bring all of it:
Custom Flow's founders have been plumbing for over 30 years, and the company has served Maryland homes since 2015. Older houses are our home turf — we've spent decades working in homes from exactly Bethesda's era.
Threading fittings, reading gauges, sizing a boiler for a house full of radiators, tying new work into 70-year-old pipe — our plumbers have the trained eye for it, and they'll give you straight advice on maintaining your home's plumbing and heating.
Work in older homes can mean sewage, gas lines, and materials from another era. Our plumbers wear protective gear and follow proper safety practices on every job, so your household and ours go home healthy.
You talk, we listen first. We understand the problem before we recommend the fix, explain your options in plain talk, and put the agreed work in writing — so there are no surprises.
We take pride in work that's still holding up years later. That care — doing it right instead of doing it fast — is why our customer list keeps growing across the metro area.
Big repairs or small leaks, a professional is always the safer bet than a DIY attempt that goes sideways. Here’s what you get with us:
Our plumbers will tell you honestly what's wrong, what it takes to fix it, and what can wait — so you spend your time and money where they actually matter.
A professional repair protects your pipes, your drains, and your property. Your home is in careful hands from shutoff to final test.
Specialized tools and proven methods resolve most plumbing problems efficiently — camera equipment when a line needs eyes on it, the right machine for the right drain, no guesswork.
Repairs and installations are covered for two years on the parts and labor we supply. If a part we installed fails within two years, we redo it. (Drain cleaning isn't warranty work — clearing a clog is a service, not a repair.) Full details are on our Services page.
If your water heater is over a decade old, leaking at the base, or running hot and cold, it's time to talk replacement. We repair and install tank and tankless units, and we'll answer the efficiency questions straight.
The most abused appliance in the kitchen. We repair disposals that can be saved and replace the ones that can't.
Drips, low flow, and worn cartridges — including the older fixtures in Bethesda's original bathrooms. If the fixture's worth saving we repair it; if it's done, we replace it cleanly.
Running, rocking, leaking at the base, or just tired. Toilet problems are the most common call in any house — we fix even the stubborn ones.
With Bethesda's finished basements and creek-side lots, this one matters. We check, repair, and replace sump pumps so a failed pump never becomes structural water damage.
We also specialize in:
Whatever plumbing problem you have, Custom Flow Plumbers can solve it. Contact us today to book your service — call (301) 971-4884.
You’re based in Oxon Hill — do you really serve Bethesda?
Yes. We serve the whole DC metro area, and Bethesda work is scheduled work: call (301) 971-4884, Mon–Fri 8am–5pm, and we’ll book you in. What we bring across the county is the thing Bethesda houses need most — decades of experience with older plumbing and heating systems.
My home has radiators. Do you work on boilers?
Yes — boiler repair, installation, and maintenance is core work for us, including tankless combi boilers. Uneven heat, a noisy boiler, or one that’s short-cycling are all worth a look before winter does the deciding.
The drains in my 1950s house keep slowing down. What’s likely going on?
At that age it’s usually the line itself — cast iron scaling inside, or roots in a clay sewer — not the fixture. A camera look tells us for sure before anyone talks about digging.
Who provides the water here?
Bethesda is served by WSSC Water. If pressure drops or water discolors across the whole house, it may be the utility’s main rather than your pipes — we can help you tell the difference.
Custom Flow Plumbers LLC — 145 Riverhaven Dr, Oxon Hill, MD 20745
Call (301) 971-4884 · Mon–Fri 8am–5pm · Rated 5.0 stars on Google
Licensed & Insured · WSSC License #P 74018