Water Main Repair & Replacement in the DC Metro Area
Your water main is the underground line that brings all the water into your home — every faucet, shower, toilet, and appliance runs off it. When that line leaks, corrodes, or breaks, the whole house feels it: pressure drops, water turns discolored, or a wet spot appears in the yard that never dries out.
Custom Flow Plumbers repairs and replaces water main lines for homeowners across the DC metro area. We find exactly where the line has failed, explain what we found and what your options are, and repair what’s repairable — or replace the line when that’s the honest fix.
Signs your water main needs attention
- Low water pressure through the whole house, not just one faucet
- Rusty or discolored water, especially when it doesn’t clear up
- A water bill that jumped with no change in how much water you use
- Soggy spots, puddles, or unusually green patches in the yard along the line’s path
- The sound of running water when nothing in the house is on
- A sudden drop in pressure — a possible break
Some of these can also point to a leak inside the house. Either way, the first step is finding where the water is actually going — guessing wrong gets expensive.
Repair or replacement?
That depends on the condition of the line, not on what we’d rather sell you:
- A spot repair can make sense when the rest of the line is sound and the failure is in one accessible place.
- Full replacement is usually the better call when the pipe is old, corroded throughout, has failed before, or is made of a material that’s at the end of its life. Replacing a failing line once beats paying to dig it up twice.
We show you what we found and explain the reasoning either way — the decision is yours, made with the facts in front of you.
Whose line is it?
In most homes in this area, the water main from the meter into the house is the homeowner’s responsibility — the utility’s side ends at the meter. If the problem is on your stretch, it’s yours to fix, and it’s worth fixing promptly: a leaking main wastes water around the clock and can undermine soil around the line and near your foundation.
If water is actively bubbling up or flooding, shut the water off at your main shut-off valve if you can do it safely, and give us a call.
How the work goes
- We locate the problem — tracing the line and finding where it’s failing, rather than digging on a guess.
- We explain what we found — where the failure is, why it happened, and whether a repair or a replacement makes sense.
- We do the work — repair or replacement, done to code, with the water back on once the new or repaired line is in and tested.
- We walk it with you — what was done, and anything about the line’s condition worth knowing for the future.
FAQ
Q: How do I know it’s the water main and not a leak inside the house?
A: Whole-house symptoms are the tell: pressure down everywhere, a bill that spiked for no reason, or wet ground outside along the line’s route. A single dripping fixture won’t do any of that. We confirm where the loss is before recommending work.
Q: Can you just repair the bad section?
A: Sometimes, yes — if the rest of the line is in good shape. If the pipe is failing throughout, a patch tends to buy a short reprieve before the next section goes. We’ll show you the condition we found and explain which route we’d take if it were our house.
Q: How long does a water main replacement take?
A: It depends on the length of the run, access, and what’s in the ground along the way. After we’ve seen the line and the property, we’ll tell you plainly what to expect before any work starts.
Q: Do you work on the utility’s side of the meter?
A: No — the utility owns and handles its side. Our work is the homeowner’s line, from the meter into the house.
Licensed & Insured · WSSC License #P 74018
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2-Year Parts & Labor Warranty on work we supply and install
A local company serving the whole DC metro area — when you call, you reach the company that does the work
Water main trouble? Call (301) 971-4884 — Monday to Friday, 8am to 5pm.