Replacement done in one visit
Water Heater Replacement in Denver, CO
When a tank is finished, the job is getting hot water back today without inheriting the last installer's shortcuts.
- Old unit removed and recycled
- Flat price quoted before we start
- Permit and inspection handled
- Most homes back to hot water same day
Replacement and installation are not quite the same job. A replacement has a deadline — usually a house full of people with no hot water — and it inherits whatever the previous installer did, which in older Denver housing stock is frequently a mix of galvanized and copper without dielectric protection, a T&P line that stops three feet off the floor, a flue with a negative slope, and no expansion tank on a system that has had a pressure-reducing valve since 1998. We correct those as part of the job, not as a surprise upcharge.
When replacement is the right call
Four findings make replacement the clear answer:
- The tank is leaking from the shell or a seam. There is no repair for a corroded pressure vessel.
- It is past twelve years old. The anode has long since been consumed and the steel is on borrowed time.
- Hot water is rusty at multiple fixtures while cold runs clear — that is the tank, not the pipes.
- The repair cost is more than half a new installed unit and the heater is past two-thirds of its expected life.
Not sure which side you are on? A diagnostic visit answers it for a flat fee, credited toward whichever way it goes.
Replacing like for like, or upgrading
The cheapest path is a same-fuel, same-footprint swap. But replacement day is the only realistic moment to change direction, so it is worth five minutes of thought.
| If you are replacing… | Straight swap | Worth considering instead |
|---|---|---|
| 40–50 gal atmospheric gas | New atmospheric gas tank | Tankless if the gas line supports it, or a high-recovery 50 gal if mornings are tight |
| Electric tank in a basement | New electric tank | Hybrid heat pump — roughly a third of the running cost, and rebates often apply |
| Electric tank in a closet or condo | New electric tank | Stay electric; heat pumps need air volume a closet does not have |
| Gas tank in a finished basement with no chimney | Power-vent gas | Tankless wall-mount, which also frees the floor space |
| Old 75 gal commercial-style unit | Same again | Two linked 50s or a tankless bank for redundancy |
Size check before you order. Federal efficiency standards changed tank dimensions in 2015. A modern 50-gallon gas unit can be two to four inches taller and wider than the one it replaces. In Denver bungalows and Capitol Hill condos with a tight utility closet, we measure the door opening, the closet header and the vent clearance before ordering — not after.
What the replacement day looks like
Confirm the quote
We verify the unit, the corrections needed and the final number before touching anything.
Isolate and drain
Gas or breaker off, cold supply closed, tank drained — pumped out if there is no floor drain nearby.
Remove the old unit
Disconnected, walked out on protected floors, loaded for recycling. Copper and steel go to scrap, not your curb.
Rework connections
New flexible connectors or hard pipe, dielectric unions, full-port ball valve on the cold inlet, correct T&P discharge to within 6 inches of the floor, gas drip leg.
Set and connect the new heater
Leveled, shimmed where the slab has settled, vent connector re-pitched with a minimum quarter-inch-per-foot rise on atmospheric units.
Expansion, fill and purge
Expansion tank installed or re-charged to match your static pressure, tank filled, air purged at the highest fixture.
Fire, test, document
Combustion and draft verified, temperature set to 120°F, warranty registered, permit inspection scheduled.
Denver-specific things we check on every replacement
Static water pressure. Pockets of Denver's distribution system run high. Above 80 psi, code requires a pressure-reducing valve, and high pressure is the quiet killer of relief valves, supply lines and tank seams. We gauge it at a hose bibb and tell you the number.
Closed-system expansion. If there is a PRV or backflow preventer on the service, the plumbing is a closed system: heated water has nowhere to expand, pressure spikes every heating cycle, and the T&P valve starts weeping. An expansion tank pre-charged to your actual pressure is required and included.
Combustion air and draft at altitude. Thin air at 5,280 feet plus a tightly air-sealed remodel equals marginal draft. We smoke-test the draft hood with the furnace and dryer running — the worst-case condition — not in a quiet house.
Old galvanized stubs. Pre-1950 homes in Baker, Berkeley and Park Hill often still have galvanized nipples at the tank connections, which corrode against copper. They get replaced with dielectric unions.
Frequently asked questions
How long does water heater replacement take?
Two to three hours for a standard tank-for-tank swap in an accessible basement. Add an hour or two for venting, gas or water-line corrections. Conversions — tank to tankless, or electric to heat pump — take most or all of a day.
Can you replace my water heater the same day I call?
In most cases, yes, provided we have your size and fuel type on the truck. Standard 40- and 50-gallon gas and electric units are stocked. Specialty units — 75-gallon, power-vent, heat pump, tankless — are typically next-day.
What do you do with the old water heater?
We remove it and recycle it. The steel shell and copper are scrapped through a metals recycler, which is both cheaper and cleaner than sending 150 pounds of steel to a landfill. There is no disposal surcharge on our quotes.
Do I have to replace with the same size?
No, but check the space first. Modern tanks are physically larger for the same gallon rating. If you want more hot water in the same footprint, a high-recovery model or a tankless conversion is usually a better route than a taller tank.
Will my homeowners insurance cover a failed water heater?
Policies typically cover the resulting water damage but not the heater itself, and many deny claims where the failure was gradual or the installation was unpermitted. That is one more argument for a permitted, inspected installation — check your specific policy language with your agent.
Is financing available for a replacement?
Yes. We offer financing on replacements and full-system upgrades, and we will tell you which current Xcel Energy or City of Denver rebates apply to the unit you choose — heat pump water heaters in particular often qualify.
Cold shower this morning? We can be out today.
Tell us what the heater is doing and we will give you a straight answer on the phone — repair, replace, or wait.