
Tankless Water Heater Installation in Billings, MT
On-demand hot water that never runs out, frees up space, and cuts energy use over time — sized and installed right for your home.
SVC · 05 — Tankless Water Heaters
Tired of running out of hot water or babysitting an aging tank? A tankless water heater heats water on demand, so you get endless hot water while reclaiming the floor space a bulky tank used to eat up.
Prime Plumbing sizes your tankless system to your household's real demand and installs it to manufacturer spec — so it runs efficiently and lasts. We'll walk you through gas and electric options in a free consultation.
Tankless services
- On-demand tankless water heater installation
- Correct sizing for your household demand
- Gas & electric tankless options
- Replacement of old tank-style heaters
- Descaling & maintenance
- Free consultation

GET IT DONE
Get a real number for your tankless water heaters project — free, in writing, from the plumber who'll do the work.
GET MY FREE ESTIMATE(406) 606-9682WHAT TO EXPECT
How the job goes
No runaround and no mystery — here's how we run the work from first call to finished job.
01
Size it to your household
Our plumber figures your real demand — how many showers, what fixtures run at once — and factors in Montana's cold incoming water, which matters more here than in most states. That determines the unit, not a brochure.
02
Straight talk on options
Gas vs. electric, tankless vs. a new tank — you get the honest trade-offs for your house and your usage, plus a written price. If tankless isn't the right call for you, we'll say so.
03
Install to spec
Gas line sizing, venting, condensate, isolation valves for future service — the details that make a tankless unit run right for 20 years instead of struggling from day one.
04
Dial it in
Our plumber sets your temperatures, tests every fixture, and shows you the controls and the simple annual maintenance that keeps efficiency up in our hard-water area.
Good to know
Tankless Water Heaters questions, answered straight
Still wondering about something? Call or text and you'll reach our plumber directly — the plumber doing the work, not a call center.
(406) 606-9682- Is tankless better than a tank water heater?
- It depends on your household. Tankless gives you endless hot water, frees up floor space, and typically costs less to run; a tank has a lower upfront price and simpler service. Big family that showers back-to-back? Tankless shines. We'll size both options for your house and let the numbers make the case.
- What does a tankless water heater cost installed?
- More upfront than a standard tank — the unit itself plus venting and sometimes a gas line upgrade — but it earns some of that back in efficiency and lifespan. The real number depends on your home's gas, venting, and demand, so we quote it after a free consultation, in writing.
- Will tankless keep up with Montana's cold groundwater?
- Yes — if it's sized for it. Incoming water here runs much colder than the national assumptions on the box, which means a unit that works fine in Texas can disappoint in Billings. Our plumber sizes for Montana's actual groundwater temperatures so your shower doesn't go lukewarm in January.
- How long does a tankless water heater last?
- Around 20 years or more with basic maintenance — roughly double a typical tank. In our hard-water area the key is an annual descale, which is quick when the unit is installed with proper isolation valves. That's standard on every Prime Plumbing install.
- How long does installation take?
- A straightforward tank-to-tankless swap is usually done in a day. If the job needs a gas line upsized or new venting, we'll tell you up front and schedule it so you're not without hot water any longer than necessary.
FROM THE RESOURCE SHELF
Guides related to tankless water heaters
SERVICE AREA
Endless hot water for homes across Billings, Laurel, Hardin, Red Lodge, and northern Wyoming. Ask us whether tankless is right for you.
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FREE ESTIMATE
Get honest pricing on your tankless water heaters project
Tell us what you need done and we'll come back with a clear, written price — free, no pressure, no surprises on the invoice.
(406) 606-9682FAST, SAME-DAY SERVICE WHEN AVAILABLE