What exactly failed?
Ask for the specific component and the test that identified it, not a general statement that the heater is old.
Water Heater Repair or Replacement
The short answer: if the tank itself is leaking, replace it. Almost everything else is worth testing first. Denver Urgent Plumber explains how the decision is made in a Denver home and what the quote should tell you.
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Compare What the Inspection Finds
| What the inspection checks | Repair may be the better call | Replacement may be the better call |
|---|---|---|
| Age of the unit | Well inside its expected service life | At or past the service life printed on the label |
| Where the water is coming from | A fitting, the drain valve or the relief line | The tank shell itself is weeping or rusted through |
| Parts | The valve, element or thermostat is still available | Parts for the model are discontinued or backordered |
| Repair history | First fault, everything else tests fine | Third or fourth call in a couple of years |
| Capacity and household | The tank still suits how the house uses hot water | The household outgrew the tank, or a remodel changed the demand |
| Installation | Venting, gas supply and pressure relief are all correct | The install needs bringing up to current code anyway |
When Repair Makes Sense
Most no-hot-water calls are a component, not a tank. On a gas unit that is usually a thermocouple, a pilot assembly or a gas control valve. On an electric unit it is typically an element or a thermostat, and sometimes just a tripped high-limit switch that points at something else. Those parts are available, the repair is quick and the rest of the heater keeps doing its job.
Rumbling and a shorter hot shower often mean sediment, not failure. Draining it out can bring back capacity on a tank that is otherwise sound. A drip from the temperature and pressure relief line is also worth investigating rather than replacing around, because it can be telling you the incoming pressure is too high or there is no working expansion tank.
See the water heater repair page for what the visit covers, and read what to check when there is no hot water before you decide anything.
When to Talk About a New Unit
A tank that is rusted through has no repair. Once the steel shell is weeping, the only question left is how quickly it gets swapped and whether anything around it was damaged on the way. The same is true of a heater that is past its service life and has already had two or three component failures; each repair buys less time than the last one.
Two things are specific to Denver. First, a gas water heater here has to be rated or adjusted for high-altitude combustion, so if the current unit was installed without that in mind, a replacement is a chance to correct it. Second, these units almost always sit in a basement utility room, which means a failed tank quietly soaks a finished floor or runs into a floor drain. Ask whether a drip pan with a drain line is possible where yours stands.
If the tank has already let go, the cleanup side is covered on the emergency repair page, and leak detection can confirm nothing else is contributing to the water on the floor.
Questions for the Inspection
What would the replacement include?
The unit, venting, gas or electrical connection, expansion tank, shutoff valve, pan, permit where required and removal of the old heater.
Is it rated for our elevation?
For a gas unit, confirm the model is approved or adjusted for high-altitude installation before it is ordered.
What happens to the warranty?
Ask for the manufacturer terms and the workmanship terms in writing, and keep the paperwork with the model details.
Still Deciding?
Whichever way it goes, the quote should be readable: the fault, the fix, the parts and the price. Compare it against how our service works, check we cover your community, or look through the plumbing questions other customers ask.
Get a plumber out to your Denver address
Tell us what the water is doing right now and we will plan the visit around it.