The short answer
In Colorado, a tankless water heater should be installed by a licensed plumber, and gas units often involve other trades too. A handyman or a friend with a wrench is not the right fit for a unit that carries gas, a vent and a pressurized water supply.
Licenses matter because a mistake here is not cosmetic. A wrong vent, a bad gas connection or a missing relief device can be dangerous, and it can complicate insurance after a loss. Checking a license takes a few minutes, and we will show you how.
Colorado plumbing license types
The state licenses plumbers in tiers, and the tier tells you who can work independently and who works under supervision.
| License. | What it generally means. | What to ask. |
|---|---|---|
| Residential. | Plumbing work in residential buildings within the scope of that license. | Confirm your job is a residential one. |
| Journeyworker. | A plumber with experience and an exam, working under a Master's supervision. | Ask who supervises the job. |
| Master. | The highest tier, qualified to supervise and run a plumbing business. | Ask for the license holder's name and look it up. |
The Colorado Department of Regulatory Agencies (DORA) licenses all three, so its lookup is the authority. Details on scope and requirements are on the Colorado plumbing board page.
How to check a plumber's license in four steps
You do not need to take anyone's word for it.
Ask for the license holder's name.
A legitimate company can give you the licensed person's full name and license type without hesitation.
Open the lookup.
Go to the Colorado DORA license lookup and search by name or license number.
Check type and status.
Confirm the license is Residential, Journeyworker or Master, and that its status is active.
Match it to the job.
Make sure the person on your doorstep is the license holder or works under one, and get the scope in writing.
Why a tankless install is more than a swap
A tankless unit heats water on demand, so it needs a lot of power in a short time. A gas model typically needs a larger gas line than a tank heater and proper venting to the outside. An electric model can need a heavy circuit, and the panel has to support it.
That is why one installer may need a gas fitter, an electrician or both. A plumber should plan the whole system before quoting. Our tankless water heater service handles the plumbing side and tells you what else the unit needs.
A tankless unit also needs a condensate drain and a way to flush scale, so the install plan includes where that water goes.
Smell gas near the heater? Get everyone out of the building before you do anything else, then call the gas utility or 911 from a safe spot. Do not look for the leak yourself.
Call (970) 708-6013Permits and inspections in Johnstown
Permit rules depend on where your home sits and what the job involves, and we will not state them from memory. Ask the Town of Johnstown building department whether your tankless install needs a permit and whether it requires an inspection.
Johnstown covers parts of both Weld and Larimer counties, so confirm with the Town rather than assuming a county office handles your address. Do this before you hire anyone, then ask the installer who pulls the permit.
Newer subdivisions around town are often built with a tank heater in a closet or garage. Switching to tankless in one of those homes is a retrofit, and the closet may need venting changes, a new gas line or a drain nearby.
Questions to ask any installer
Ask who holds the license on the job, whether they will pull the permit, and what happens if the inspector requires a change. Ask how they size the unit, what happens to the old heater and whether the quote includes venting, gas line work and the condensate drain.
Get the scope, the parts and the warranty paperwork in writing before work begins. If the answer to any of these is vague, keep looking.
Our crew can also help if you are still deciding between a tank and a tankless unit. Water heater installation covers the traditional option, and homeowners in Greeley and Berthoud ask us to compare both.
What a good written quote includes
A solid quote names the unit by brand and model, and states whether it is gas or electric. It lists the venting, the gas line or electrical work, the condensate drain, the isolation valves used for flushing, and the disposal of the old heater.
It also names the licensed person responsible and says who handles the permit question with the Town. If two quotes differ a lot, compare these line items first, because the cheaper one often leaves something out.
Ask what happens after the install, including how to flush the unit and how often a plumber should look at it. Keep a copy of the quote and the paperwork with your home records. Scale buildup is the most common reason a tankless heater loses performance, so a plan for maintenance belongs in the conversation.
Red flags to walk away from
Walk away if someone cannot name the license holder, asks you to pull the permit yourself without explaining why, or offers a price far below everyone else. A very low number often leaves out venting, the gas line or the permit.
Be wary of anyone who says inspections are optional. If you are unsure, the Town building department can tell you what applies to your address.
Tankless installer questions
It is a poor DIY job. Gas, venting and pressurized water are all involved, and mistakes are costly. Use a licensed plumber and ask the Town of Johnstown building department about permits.
The state issues Residential, Journeyworker and Master plumbing licenses. Look up any plumber on the Colorado DORA license lookup to confirm the type and status.
Not necessarily. A Master typically supervises and runs the business, while a Journeyworker or Residential plumber may do the work under the right conditions. Ask who holds the license and how the job is supervised.
Ask the Town of Johnstown building department. Rules depend on the job and the address, so do not rely on a general answer.
Get out of the building before doing anything else, then call the gas utility or 911. Do not try to find the leak or turn anything on or off inside.
Not always. It suits some households and some homes, but the gas line, venting and cost of the retrofit decide it. A plumber can look at the current setup and tell you.
A failed tank is usually replaced the same way first, and a tankless install is planned. If your heater fails at night, call the 24/7 line and a plumber will help you get hot water back.