Water heater repair
When a part rather than the tank has failed, worth checking first.
Learn moreWater heaters
Water heater installation: sized right, vented right, permitted
A replacement is not a like-for-like swap unless the old one was right in the first place. Sizing, venting, expansion, pan and drain, and the shut-off you will need one day are all decided on installation day and hard to revisit later.
Lines are open right now:
(833) 472-2088
Tank failed? Same-day replacement where stock allows.
Sized to the household
Bathrooms and habits, not the size of the old one.
Old unit taken away
Disconnected, drained, removed and recycled.
Permit and inspection
Standard for replacement in Idaho jurisdictions.
Done in a day
Most straight replacements are a single visit.
The decision
Four types, and who each one suits
Standard gas tank. Atmospherically vented into an existing flue, the most common replacement in Idaho housing. Cheap to buy, cheap to install where a suitable flue exists, cheap to run on natural gas, and it keeps working in a power cut. It needs combustion air and a sound vent, and it is the least efficient option on the market.
Electric tank. Simple, no venting, no combustion air, installable almost anywhere including interior closets. It suits houses with no gas service, which covers a great many rural properties, cabins and all-electric subdivisions. Recovery is slower than gas, so sizing matters more.
Power vent or direct vent gas. Vents horizontally through a wall with a fan, which frees the installation from an existing chimney and suits basements, tight utility rooms and houses where the old flue has been abandoned. More efficient, more electronics, needs a power outlet, and it is audible when running.
Heat pump (hybrid) electric. Two to three times the efficiency of a resistance tank, with real running-cost savings. It needs a reasonable volume of air around it, produces cool air and condensate, is noticeably taller than a standard tank, and it performs best in a space that stays above roughly 40°F, which in Idaho rules out plenty of unheated garages in January but suits a basement or a conditioned utility room well.
And tankless, which is a different enough project to have its own page: tankless water heater installation.
Sizing is about recovery, not just gallons
A 40-gallon gas unit with fast recovery can out-perform a 50-gallon electric for a family taking consecutive showers. What matters is first-hour delivery, the volume of hot water available in an hour of real use, and the honest inputs are the number of bathrooms, whether showers overlap, and whether a large tub or a high-flow shower head is in the picture.
Get it sized on bathrooms and habits, not on the old label.
The details that matter
The parts of the job you cannot see afterwards
Relief valve and discharge piping
A temperature and pressure relief valve, with a discharge pipe of full size running to an approved termination where a discharge will be noticed and will not scald anyone. Never capped, never valved, never reduced. This is the single most important safety element of the installation.
Thermal expansion control
Where the house has a pressure regulator or a check valve, the plumbing is a closed system and heated water has nowhere to expand. Without an expansion tank the pressure rises every heating cycle, which weeps the relief valve, stresses fixtures and shortens the tank’s life. An appropriately sized and correctly charged expansion tank is part of the job, not an upsell.
Shut-off valve and unions
A cold-side shut-off within reach, and unions so the unit can be isolated and removed without cutting pipe. The next person to work on it, possibly you, at midnight, depends on both.
Pan and drain
Where a leak would damage the building, a drain pan piped to a safe termination. This is what turns a failed tank in a finished basement or an upstairs closet from a ruined ceiling into a wet pan.
Venting and combustion air
On gas: correct vent material and slope, proper connector length, no reduction in size, and adequate combustion air for the space. On a power vent, the manufacturer’s vent length and termination clearances are not negotiable.
Gas, electrical and seismic detail
A gas shut-off at the appliance with a sediment trap where required, flexible connectors where permitted, correct breaker and conductor size on electric, bonding, and secure standing. Dielectric transitions where copper meets steel.
Permit and inspection
Water heater replacement is permitted work in Idaho jurisdictions and the inspection is your record that the venting, relief and expansion detail was done correctly.
Where it goes
Garages, crawl spaces, cabins and cold rooms
Garage installations. Extremely common here and generally fine, with two caveats. Ignition source elevation requirements apply where vehicles are stored, and an unheated garage in an Idaho January means a cold inlet, longer run times and a real freeze risk on the supply lines feeding the unit. Insulating those lines at installation is cheap; a burst line above a new heater is not.
Basements and utility rooms. The best case: conditioned space, easy access, room for an expansion tank, and the right environment for a heat pump unit if you want the efficiency.
Crawl spaces. Legal but unpleasant, and the practical problem is service access. If your heater is in a crawl space, every future repair costs more. Where an alternative location exists it is usually worth the plumbing to relocate it during a replacement.
Interior closets and upstairs installations. A pan piped to a drain is essential rather than optional. A tank failure on an upper floor without a pan is one of the most expensive events in residential plumbing.
Cabins and seasonal homes. In the mountain valleys and along the Panhandle lakes, the questions are what happens when the building is left unheated and how easily the system can be drained. That shapes the choice of unit, the valving and the drain-down provision. See cabin and seasonal home winterization.
Well systems. Properties on private wells have their own pressure and sediment profile, and a sediment filter ahead of a new heater is often a sound investment. See well pump and water system service.
Hard water. Across the Snake Plain and much of southern and eastern Idaho, hardness is what determines how long the new tank lasts. Softening or conditioning at the same time as a replacement protects the investment, see water softener installation.
Ask what a heat pump unit would cost to run in your space.
Money
What drives the price of a replacement
The unit itself. Capacity, fuel, efficiency and warranty. A longer warranty usually means a better anode and a heavier tank, and in hard water that is worth paying for.
Whether it is a straight swap. Same fuel, same type, same location, sound vent: cheapest possible outcome. Anything else adds work.
What has to be brought up to standard. Older installations frequently lack an expansion tank, a pan and drain, a serviceable shut-off, or a compliant relief discharge. A quote that includes those items is not more expensive than one that omits them, it is a different scope, and the inspector will notice the difference.
Venting changes. Moving from atmospheric to power vent means new wall penetration, vent pipe and an outlet. Abandoning an old flue for another appliance sharing it has to be thought about too.
Access. Down a basement stair, through a crawl space hatch, up to a second-floor closet, or around a finished laundry. A 50-gallon tank is heavy and awkward and access is real labour.
Fuel conversion. Electric to gas needs a gas line and venting; gas to electric needs a suitable circuit. Both are projects rather than swaps. See gas line services.
Removal and disposal. Should be included. Ask, and ask whether permit fees are in the number too.
Three questions worth asking any installer. Is a permit being pulled and who arranges the inspection? Is an expansion tank included and if not, why not? What exactly is the warranty on the tank, and separately on the labour?
What to expect
Four to six hours, and what happens in them
Water off, unit drained. Draining a 50-gallon tank takes time, more if sediment has built up, and on an old unit the drain valve sometimes has to be worked around. This is often the longest single part of the day.
Old unit out. Gas or power disconnected, vent broken down, connections cut, tank walked out. It leaves on the truck for recycling.
New unit set and connected. Positioned for service access and clearances, connected with unions and a shut-off, relief discharge piped correctly, expansion tank fitted and charged, pan and drain where required, vent assembled to the manufacturer’s instructions, gas connection leak tested or electrical terminated and torqued.
Fill, purge and fire. Tank filled and air purged through a hot tap before power or gas is applied, a dry-fired electric element is destroyed in seconds. Then light-off, temperature set around 120°F, and a check for draft on gas or amp draw on electric.
Check and hand over. Connections checked for weeping under pressure, relief valve verified, temperature confirmed at a tap, and you get shown the shut-off, the pilot or reset procedure, the flushing routine and where the paperwork and registration details are.
Inspection. Booked with the jurisdiction. Keep the paperwork with the house, it matters when you sell, and it matters if you ever make a warranty claim.
Emergency replacements. When a tank has failed and there is water on the floor, replacement happens the same day where stock allows. It is worth knowing that an emergency swap sometimes forces the available unit rather than the ideal one, which is a reason to replace a tired tank on your own schedule rather than its.
Permit, expansion tank and pan should all be in the quote.
How it runs
From failed tank to hot water, in a day
Sizing and code items settled before the truck is loaded, so installation day has no surprises.
1. Size it and check the site
Bathrooms, usage pattern and fuel confirmed; vent, combustion air, clearances, electrical supply and drain availability checked; expansion, pan and shut-off requirements identified before quoting.
2. Out with the old
Isolated, drained, disconnected and removed for recycling, with the vent and connections assessed rather than reused blindly.
3. Install, test, inspect
New unit set and connected to code, purged and fired, temperature set and verified, relief and expansion detail confirmed, and the inspection booked with the jurisdiction.
Coverage
Installations across all six regions
Replacements run statewide, garage and basement installations across the Treasure Valley, all-electric and well-fed systems through the farming communities and rural eastern Idaho, and cabins in the mountain valleys and along the Panhandle lakes where drain-down provision matters as much as capacity.
Questions
Water heater installation questions
It depends on bathrooms, how many people shower in sequence and whether you have a large tub or high-flow shower heads. A common starting point is 40 to 50 gallons for a family of three or four on gas, and one size larger on electric because recovery is slower.
Look at first-hour delivery rather than tank volume alone. A fast-recovery gas 40 often out-performs an electric 50 in real morning use.
In Idaho jurisdictions, generally yes, with an inspection. The inspection covers exactly the things that go wrong when installations are done casually, relief valve discharge, venting, combustion air, expansion control and seismic or securing detail.
The contractor pulls the permit and arranges the inspection. Keep the record with the house.
In the right space, yes. Running costs are a fraction of a resistance electric tank, which matters most on all-electric properties.
The conditions are real, though: it needs air volume around it, it produces cool air and condensate that needs a drain, it is taller than a standard tank, and it performs poorly in a space that drops near freezing. A conditioned basement or utility room is ideal; an unheated garage in a cold valley is not.
Four to six hours for a straightforward like-for-like replacement, including draining the old tank, which is often the slowest part.
Longer if venting changes, if the location moves, if an expansion tank or pan and drain has to be added, or if access is awkward. Fuel conversions are a separate project rather than a day’s work.
If your house has a pressure regulator or a check valve on the incoming supply, most modern installations do, then yes. The system is closed, and water expanding as it heats has nowhere to go.
Without one you get a weeping relief valve, pressure spikes on every cycle, stressed fixtures and a shorter tank life. It is a small part of the cost and it is required in these situations.
Usually, where a suitable unit is in stock. Emergency replacements happen daily.
The trade-off is that an emergency swap can mean taking the unit that is available rather than the best fit, which is a fair argument for replacing a tank at ten or eleven years on your own schedule rather than waiting for the floor to get wet.
It is worth pricing, and it is not automatically better. Tankless gives you continuous hot water and a long service life, and it typically needs a larger gas supply, new venting and a descaling routine in hard water.
Where the gas and vent work is straightforward the case is strong. Where it means running a new gas line across a finished basement, a good tank is often the better value. Details on tankless water heater installation.
Around 120°F suits most households, adequate for normal use, less scale formation, lower running cost and a much lower scald risk, which matters with small children or elderly residents.
Higher settings are sometimes chosen for dishwashers without internal heating or for specific needs, and they shorten tank life. Where a higher setting is wanted, a mixing valve at the outlet gives you the storage temperature without the scald risk at the tap.
Eleven-year-old tank? Replace on your schedule, not its.
Installed once, properly, with the paperwork
Sized to your household, vented to code, permitted and inspected. Call any hour to arrange a replacement anywhere in Idaho.
(833) 472-2088