Planning a water heater install the right way
Water heater installation is the planned work of choosing a unit, preparing the space and connecting it to water, fuel and a safe vent. It is different from an emergency swap, because you have time to compare options and fix the problems the old setup carried. Our dispatch line runs 24/7, but most installs are booked ahead.
Good installs start with questions: who lives in the house, how many baths run at once, what fuel is available, and where the unit will sit. The answers shape everything that follows.
Sizing the unit to how your household really lives
Sizing is where many installs go wrong. A unit that is too small leaves the last person in line with a cold shower, and one that is too large wastes space and fuel. The right choice follows your peak demand, not your square footage.
| Household pattern | What to ask | Usual direction |
|---|---|---|
| Two people, one bath | Do showers ever overlap with the dishwasher? | A modest tank usually fits. |
| Family with morning rush | How many hot taps run in the same half hour? | A larger tank or high-recovery unit. |
| Large soaking tub or multiple baths | Can the supply refill fast enough? | Larger tank or tankless sized to flow. |
| Frequent guests or a rental unit | Does demand swing between empty and full? | Tankless or a bigger tank. |
| Workshop or laundry heavy home | Does laundry run alongside showers? | Extra recovery speed. |
If you are leaning toward on-demand heat, the tankless water heater page explains flow, gas supply and scale. For a broken tank that needs immediate help, emergency water heater replacement is the faster path.
Where it goes: location, clearances and venting
The spot matters as much as the unit. A heater needs a level base, a drain pan with a drain line that runs to a safe place, and room around it for service. Gas models need combustion air and a vent pipe sized and pitched correctly. A bad vent can spill exhaust into the house.
Moving the unit is a common reason for a planned install. Owners shift heaters out of cramped closets, away from bedrooms, or closer to the kitchen and baths to shorten the wait for hot water. Longer runs mean more piping, so we map the route before quoting.
Weighing tank against tankless?
Describe your household and we will walk through sizing and venting.
Before we arrive: preparing the space
- Clear a path from the door to the heater and leave a work area around it.
- Find the main water shutoff and the gas shutoff and show them to the plumber.
- Move stored items away from the heater, especially anything flammable.
- Ask about permits, because rules vary, so ask the Brigham City building office at (435) 734-6604 before starting.
- Keep children and pets out of the work area.
Gas, electric or heat pump: fuel decides the install
- Gas: needs a gas line sized for the load, a shutoff, a sediment trap and a vent that terminates safely.
- Electric: needs a circuit sized to the unit and a breaker that matches. The wire gauge is not a guess.
- Heat pump: needs open air space, a condensate drain and a dedicated circuit.
- Switching fuels: plan the work in advance, because capping a gas line or adding a circuit takes more than one trade day.
If you ever smell gas near a heater, leave first, then call 911 or the gas utility. Gas work belongs to licensed hands, and our plumbing installation crews handle the supply side.
The expansion tank and pressure side
Heating water in a closed system raises pressure. Brigham City publishes guidance on thermal expansion in water heating systems, and an expansion tank is the common fix. It gets sized and charged to your house pressure and mounted on the cold line. Ask Public Works about pressure testing if you suspect high street pressure.
New construction and remodel timing
In a new build or a gut remodel, the heater is usually set after rough-in and before final inspection. Tell us the plan early. We can place stub-outs, vent paths and drain locations while the walls are open, which avoids cutting later.
Because local water is hard, a softener can share the same utility space, and a bypass loop makes future service easier. That is a single conversation worth having during the rough-in stage.
Permits, licensing and who should do the work
Permit rules vary, so ask the Brigham City building office at (435) 734-6604 before starting. They can tell you whether your install needs a permit and which code edition applies. Utah adopts plumbing codes through the state.
You can also confirm that any plumber is licensed. The Utah Division of Professional Licensing offers a Verify a License tool, and it lists classes from apprentice to master. Check the name against the person on your doorstep, ours or anyone else's.
Install day, start to finish
- Walk-through
We confirm the location, fuel, venting path and any code items on site.
- Shut off and set up
Water is closed, the area is protected and the old unit is drained if one exists.
- Set the new heater
The unit goes on its pan or base, level and clear of combustibles.
- Connect and vent
Water, fuel, relief valve, expansion tank and vent are connected and checked.
- Fill, fire and test
We purge air, restore power or gas, check for leaks and confirm temperature at the fixtures.
- Walk you through it
You see where the shutoffs are and how to set the temperature.
What influences an installation price
Unit type and size
Tank, high-recovery, tankless and heat pump units sit at different price levels.
Venting and fuel changes
A new vent run, gas line or circuit adds labor.
Relocation
Longer pipe runs and more cutting mean more time.
Code items
Expansion tank, pan, drain and relief valve routing.
Access and demolition
Attic and crawlspace installs take longer.
Insurance rarely pays for a planned upgrade, though it may respond to sudden damage from a failed unit. Want your real number? Call (855) 575-2890 for a clear price before work starts.
Installs from the shop to Willard
Installs run from our shop at 647 S Main St in Brigham City, and Willard plumbing service is about 7 miles south, roughly 12 minutes. Book a planned install a few days ahead if you can, so parts and permits line up. Not every heater job is a plumber's job: electrical panel upgrades go to an electrician, and a gas meter change belongs to the utility.
Frequently Asked Questions
A same-fuel tank swap is often done in a single visit. Moving the heater, changing fuels or adding venting can stretch the work over more than one day.
Yes. We ask about the number of baths, peak use and fuel, then explain the options and the trade-offs.
In many closed systems, yes. Brigham City publishes guidance on thermal expansion, and we check your set-up on site.
Usually. Longer pipe runs, a new vent path and a new drain location are the main items to plan.
Yes. Tell us the schedule early so stub-outs, venting and drain points are set at rough-in.
Use the Utah Division of Professional Licensing Verify a License tool. It lists apprentice, journeyman, residential journeyman, master and residential master classes.
Sources and standards
- Plumbing codes in the UPC and IPC families set the rules for fixtures, venting and drains. Ask the Brigham City building office at (435) 734-6604 which edition and permit rules apply to your job.
- The Utah Division of Professional Licensing offers a public Verify a License tool for checking any plumber's license class.
- The Brigham City Water Division explains hardness, pressure testing and water quality on its water page. Call Public Works at (435) 734-6615 with questions.
- Enbridge Gas Utah says to leave the building first if you smell gas, then call 911 or its 24-hour emergency line from outside.
Written by Brigham City Pro Plumbing. Last updated October 29, 2026.