Gaithersburg Water Heater Installation & Repair

WSSC-licensed water heater installation, replacement, and repair in Gaithersburg, MD. Tank, tankless, gas and electric — Olde Towne, Kentlands, Quince Orchard, Washingtonian.

Gaithersburg has some of the most modern housing stock in Montgomery County — Kentlands, Lakelands, Quince Orchard, the Washingtonian district, plus the steady infill of new construction near the I-270 corridor. The result: a lot of homes built with tankless-ready gas service, alongside the older Olde Towne sections where standard tank water heaters still make the most sense. We handle both ends of the spectrum and everything in between.

Durance is WSSC-licensed and we pull the permit on every water heater install. Gaithersburg is mostly under WSSC jurisdiction, with a small portion of permits handled by the City of Gaithersburg — we know which is which based on your address and pull the right paperwork automatically.

Water Heater Services in Gaithersburg

Tank Water Heater Installation & Replacement

For older Gaithersburg homes and for households that prefer simpler, lower up-front cost, a standard 40-, 50-, or 75-gallon tank is still the right answer. We install Bradford White and Rheem, both professional-grade brands that hold up better against WSSC’s mineral water than the budget tanks sold at Home Depot or Lowe’s. Both are stocked on our trucks for same-day and next-day installs.

Every replacement includes a properly sized thermal expansion tank, vacuum relief valve where 2026 code requires one, new shutoff valves, and disposal of the old unit. If venting or gas connectors need an update to pass inspection, we handle it in the same visit — not as a surprise add-on at the end.

Tankless Water Heater Installation

Gaithersburg is one of the easier markets in Montgomery County for tankless conversions because so much of the housing stock is newer and was built with gas service sized to support a tankless unit. Kentlands, Lakelands, and Washingtonian homes in particular often convert without needing a gas line upsize. Older Olde Towne homes can sometimes be converted too, but the gas line and venting often need work.

Tankless units deliver endless hot water, free up basement floor space, and typically last 18–20 years versus 8–12 for a tank. They also qualify for various Maryland energy efficiency incentives. Compare current tank and tankless models at WaterHeatersNearMe.pro, Durance’s water heater division.

Emergency Repair

No hot water, leaking tank, pilot won’t light, lukewarm showers? Most water heater problems we see in Gaithersburg are diagnosable over the phone with the unit’s make, model, and a couple of photos. Call (301) 270-6663 with the details and we’ll tell you what’s likely wrong and how fast we can be there.

Why Gaithersburg Homeowners Choose Durance

We know the jurisdiction split. Most of Gaithersburg falls under WSSC, but the City of Gaithersburg handles some permits separately depending on address. We identify the correct authority and pull the right permit automatically.

We understand newer construction. Kentlands, Lakelands, and the I-270 corridor developments have specific construction patterns — water heater locations in utility closets, particular venting configurations, gas service sized for tankless. We’ve worked in these homes for years and know what to expect.

Code-compliant, every time. 2026 Maryland code requires thermal expansion tanks and vacuum relief valves on new water heater installations. Many quick-turnaround installers skip them. We don’t, because they prevent dangerous pressure buildup and they’re part of passing inspection.

Signs Your Water Heater Needs Attention

• 10+ years old. Most Gaithersburg tank water heaters last 8–12 years. Newer homes may have units that are coming due for their first replacement now.
• Popping or rumbling. Sediment cooking at the tank bottom. Eventually cracks the wall.
• Visible rust. Top valves or tank base. Once corrosion breaches, you have hours.
• Lukewarm showers. Failed dip tube or heating element. Sometimes repairable.
• Discolored hot water. Often an anode rod issue. Sometimes a tank-end-of-life sign.
• Error codes (tankless). Tankless units throw codes when things go wrong. Many are simple to address.

Neighborhoods We Serve in Gaithersburg

We cover all of Gaithersburg including Olde Towne Gaithersburg, Kentlands, Lakelands, Quince Orchard, Washingtonian, Montgomery Village edge, Diamond Farms, Westleigh, Goshen Estates, Saybrooke, Brighton West, Crown Farm, and the Rio/Washingtonian Center area, plus surrounding Montgomery County addresses up to Germantown.

Common Questions

Is Gaithersburg under WSSC or the City of Gaithersburg for plumbing permits?

Most Gaithersburg addresses fall under WSSC jurisdiction for plumbing, but the City of Gaithersburg handles certain permits in specific areas. Durance identifies the correct authority for your address and pulls the right permit automatically.

My Kentlands home was built with tankless. Should I stay tankless or switch to a tank?

Almost always stay tankless — your home was built around it. Tankless units typically last 18–20 years, and if your current unit is reaching that age, replacement with another tankless is straightforward.

My older Olde Towne home has a 50-gallon gas tank. Tankless conversion worth it?

Depends on the gas line size, your peak hot water demand, your time horizon in the home, and your budget. We’ll walk through the trade-offs honestly. For some homes it’s a clear win; for others a high-efficiency tank wins on total cost of ownership.

What brands do you install?

Bradford White and Rheem — professional-grade brands not sold through big-box retail, with manufacturer warranties of 6–12 years depending on tier.

How long does an installation take?

A standard tank-for-tank swap takes 2–4 hours. Tankless replacement of an existing tankless takes 3–5 hours. Conversion from tank to tankless typically takes a full day or more.

Need a Water Heater in Gaithersburg? Call Durance.

Call (301) 270-6663 for a same-day estimate, or request service online.

Related Pages

• WSSC Licensed Plumbing Services in Gaithersburg (full service)
• Montgomery County Water Heater Service
• Silver Spring Water Heater Service (also Montgomery County)
• Water Heater Installation & Repair (main page)
• WSSC Licensed Plumbing Services in Germantown (neighboring city)
• Takoma Park Water Heater Service (our home base)
• WaterHeatersNearMe.pro — Durance’s dedicated water heater division
• Gas · Electric · Hybrid water heaters