We're the only plumber in Rockville, Potomac, and Gaithersburg who does one thing — install premium tankless water heaters at a published, all-in price. No surprise fees. No high-pressure upsells. Your old tank out by noon, endless hot water by dinner.
The 50-gallon tank in your Rockville basement is a 1950s invention, burning gas 24 hours a day to keep water hot you aren't using. There's a better way, and Montgomery County homes are built for it.
Tanks typically die during peak use. A tankless system heats water on demand — nothing to rust, corrode, or flood your finished basement at 3am.
Your 50-gal tank holds one family bath. A properly sized Navien NPE-240A2 delivers 10.1 GPM — that's two showers + laundry + dishwasher, forever.
Washington Gas estimates a family of four saves up to $1,800 over the unit's lifetime with a tankless vs. a standard natural gas storage model.
A wall-mounted tankless reclaims the corner of your utility room. Built-in leak sensors and no tank = no $10K water-damage claim on your homeowners insurance.
Call three Montgomery County plumbers, get quotes of $2,400 to $7,800 for the same job. We publish three fixed tiers with full scope & terms.
Skipping permits bites at resale and voids insurance claims. We handle Montgomery County permit filing and inspection scheduling — baked in.
Tank heaters last 10–15 years at best. Tankless units routinely run 20+ years with annual flushes. One replacement instead of two in your tenure.
Rockville water comes from the mineral-rich Potomac. Standard tanks corrode fast here. Our installs include descaling service valves + first-year flush included.
Energy savings, one-time rebates, deferred replacement, extended warranty, reclaimed floor space. A tankless pays for itself twice.
Every tier includes the unit, removal, permit, standard venting, standard gas connection, condensate tie-in, initial flush kit, and rebate paperwork. See our full pricing page for complete scope & terms — no hidden add-ons.
We designed this around how long it actually takes the Montgomery County permit office to turn around paperwork. Your install day itself is a single, clean visit.
Six questions. Thirty seconds. You'll see your fixed tier, rebate estimate, and financing options before you even pick up the phone.
A licensed master plumber verifies gas sizing, venting path, and every item on our scope sheet. You get a final, locked-in quote on the spot — no back-office callback.
Montgomery County permit, WSSC coordination, utility scheduling — all handled. You pick a Tuesday or Wednesday install day.
Old tank out by noon. New tankless wall-mounted, gas + water + vent + condensate tied in, commissioned, and flushed. Hot showers by dinner.
Answer six quick questions and we'll show you your tier recommendation, fixed price, and stacked rebates — before we ever speak.
We use this to size your tankless — GPM needs scale with simultaneous fixture demand.
Answer six quick questions on the left. We'll calculate your tier, stacked rebates, and monthly financing options in real time — no email required to see it.
No marketing fluff. Real numbers from Washington Gas, Energy Star, and 200+ installs we've completed in Montgomery County. Full breakdown on the tank vs. tankless page.
Every plumber claims to "work on all brands." We only install the three that earn their premium — the ones with parts availability, warranty support, and long-term reliability we'd put in our own homes.
Industry leader in condensing tankless. NPE-A2 series includes built-in recirc pumps — a feature others charge extra for. Best for homes wanting instant hot water everywhere.
The reliability benchmark. Simpler to service than Navien, with exceptional heat exchanger longevity. RX series is our pick for homeowners who want "set and forget" for two decades.
Best-value tankless with strong US parts network. The Prestige line matches Navien and Rinnai on efficiency, with slightly lower upfront cost. Ideal for budget-conscious buyers.
We stay small, stay local. Every tech lives within 20 minutes of your home — so when we say same-week install, we mean it. Click any city to see local pricing and rebate detail.
Every other plumber wanted to come out, poke around my basement, and then call me back with a number. DMV Tankless gave me the fixed price on their site — $5,295 — and that was the exact number I paid. Install took one day. Hot water hasn't dropped once since.
We publish every review we get — including the 4-stars. See all 200+ on our reviews page.
"Three quotes from other Montgomery County plumbers ranged from $4,200 to $7,800 for the same scope. DMV Tankless told me $5,295 on their website. That's what I paid. Showed up Tuesday, done by 3pm."
"What I appreciated most: they actually pulled the Montgomery County permit. Previous contractor didn't, and I had issues when I tried to refinance. DMV Tankless handled everything — inspection, sign-off, rebate paperwork."
"My family of six was running out of hot water daily with the old 50-gal tank. They installed the Navien 240A2 with recirculation. Three showers going, dishwasher running, nothing drops. Should have done this years ago."
Nothing buried. See the full FAQ for 40+ more.
Our fixed tiers are $3,895 (Essential), $5,295 (Signature with recirculation), and $7,495 (Whole-Home Pro for 4+ bath homes). All prices are all-in — unit, permit, standard venting, gas/water/condensate connections, old-tank haul-away, and all rebate paperwork. Most Montgomery County homeowners qualify for $1,150–$1,400 in stacked rebates, dropping the net price accordingly.
One day — typically 6–8 hours from arrival to commissioning. We arrive around 8am, the old tank is out by noon, and by mid-afternoon the new unit is mounted, gas/water/venting/condensate are all connected, the system is flushed and pressure-tested, and you're ready for a hot shower by dinner. From your first consult to install day is usually 8–12 days, most of which is Montgomery County permit processing.
Yes. Both the City of Rockville and Montgomery County require permits for water heater replacement and any conversion from tank to tankless. Skipping the permit voids homeowners insurance coverage for related water damage and creates issues at resale. We pull the permit, schedule inspection, and hand you the signed card — it's included in the fixed price.
Natural gas customers in Montgomery County stack four rebates: Washington Gas rebate up to $450, Maryland manufacturer rebate of $100, federal tax credit of 30% (up to $600), and Montgomery County property tax credit up to $250. Total stackable savings reach $1,400 for qualifying Energy Star units. We file every form on your behalf.
For most Montgomery County homes with 3+ bathrooms or 3+ occupants — yes. You'll save roughly $95–$200/year on gas (Washington Gas figures), get 20+ year lifespan vs. 10–15 for tanks, reclaim 4 sq ft of floor space, and eliminate basement flood risk. Factor in ~$1,400 in rebates and a 15-year total cost of ownership that's lower than a tank, and the math works out favorably for most homeowners.
We install three brands only: Navien, Rinnai, and Rheem. These are the brands with the best parts availability in the DMV, strongest warranty support, and proven 20+ year reliability. We decline to install off-brand tankless units even when requested — we won't install what we can't stand behind.
Book your free 45-minute in-home consult. A licensed master plumber will verify sizing, lock your fixed price, and answer every question. Zero commitment.