Hot water, back on. Tank or tankless.
We repair and replace standard tank water heaters, and install and service Navien and Rinnai tankless systems. We’ll help you choose what fits your home and budget.
Water heaters aren’t a side job for us.
We specialize in traditional tank systems and high-efficiency Navien and Rinnai tankless systems. We’re a Navien Licensed Authorized Installer and Service Specialist with more than 2,000 Navien units installed.
- Water heater repair and replacement
- Tankless installation, repair, and yearly maintenance
- Tank-to-tankless conversions
- Combi boilers that handle heat and hot water (see boilers)
Tankless doesn’t win every category.
Here’s the honest comparison. The right choice depends on your home, your budget, and how your household uses hot water.
Tank
- Lower upfront cost
- Hot water from what’s stored in the tank
- Usually a straightforward swap
Tankless
- Continuous hot water, when sized correctly
- Compact and wall-mounted
- May need gas, venting, or drain changes
| Feature | Tank | Tankless |
|---|---|---|
| Upfront cost | Lower | Higher |
| Hot water supply | What’s stored in the tank | Continuous, when sized correctly |
| Space | Larger footprint on the floor | Compact and wall-mounted |
| Switching | Usually a straightforward swap | May need gas, venting, or drain changes |
| Best for | Fast, budget-friendly replacement | Households that run out of hot water or want space back |
What should I expect when replacing a tankless water heater?
Here’s how it goes, start to finish, so nothing about install day is a surprise.
We size it to how you use water
How many showers run at once, your incoming water temperature, and the fixtures in your home decide the unit size.
We check what the install needs
Gas line capacity, venting route, condensate drain, electrical, and where the unit will hang. If anything has to change, you’ll know before install day, along with the price.
Install day
We shut off water and gas, remove the old heater, mount the new unit, connect gas, water, venting, and condensate, then fire it up and test it.
We show you how it works
We walk you through the controls, what’s normal, and what isn’t, and we leave the area clean.
Keep it healthy
Tankless heaters should be serviced once a year, including flushing scale from the heat exchanger. Regular maintenance also helps keep the manufacturer’s warranty valid.
Washington Gas rebates
| Qualifying install | Virginia | Maryland |
|---|---|---|
| Tankless water heater | $400 | $450 |
We’re a verified Washington Gas participating contractor, and we handle the rebate paperwork for you.
Rebate terms set by Washington Gas. Available to qualifying Virginia and Maryland Washington Gas customers; equipment and eligibility rules apply.
Questions people ask us
What should I expect when replacing a tankless water heater?
We size the new unit to how your household uses hot water, check gas, venting, condensate, and electrical needs, then remove the old heater, install and test the new one, and show you how it works. The full step-by-step is above.
Should I repair or replace my tank water heater?
Water coming from the tank itself usually means the tank is failing and needs replacing. Burner, thermostat, and valve problems can often be repaired. We’ll tell you which one you’re dealing with.
Can I switch from a tank to tankless?
Often, yes. It depends on your gas or electrical capacity, the venting route, a place for condensate to drain, and how much hot water you use at once. We check all of it during the visit.
Why does my tankless heater go hot, then cold, then hot?
A short burst of cold water can happen when hot water is turned off and back on quickly. Scale buildup, a dirty inlet filter, or a flow sensor problem can make it worse. Yearly service helps.
Tell us what your heater is doing.
Tank or tankless, gas or electric, and roughly how old, if you know. A photo of the label helps when we get in touch.
JM Plumbing has installed two tankless water heaters for us at two houses, and both times have been professional and expertly done. They've also done HVAC maintenance and other plumbing work which has been great as well. Highly recommended.
Request water heater service
Takes about a minute. We’ll contact you to confirm availability.