Tankless Water Heater Replacement Austin TX

Replacement covers two different jobs. One is converting a storage tank to tankless, which involves gas, venting, water lines and a permit. The other is swapping a tankless unit that has reached the end of its life for a new one, which is faster and cheaper because the infrastructure is already there.

Either way, we take the old equipment with us and leave the space clean. If the old unit is under warranty we handle the manufacturer claim rather than handing you a phone number.

What replacement includes

Assessment of whether repair or replacement is the better spend, in writing
Warranty claim handled with the manufacturer where the unit still qualifies
Correct resizing — the old unit's rating is a starting point, not an answer
Gas, venting, water and condensate connections brought to current code
Permit pulled and inspection attended
Old unit drained, removed and recycled
Isolation valves fitted if the previous install did not have them

Old storage water heater removed on a hand truck beside a new wall-mounted tankless unit

How the day goes

1

Call or send the form

Tell us the house, the fuel, and what is going wrong. Most quotes need five minutes on the phone and a photo of your current heater.

2

On-site sizing visit

We check gas line size, venting route, electrical capacity and your peak hot water demand, then put a fixed price in writing.

3

Installation day

Most changeovers take four to eight hours. Gas line or venting upgrades can add a day. We protect floors and haul the old tank away.

4

Inspection and handover

We meet the city inspector, walk you through the controller, and set your first descaling reminder.

When replacement beats repair

The heat exchanger is leaking and out of warranty
The unit is fifteen or more years old and parts are getting scarce
You are on your third repair in two years
The unit was undersized from the start and never kept up
A storage tank is showing rust at the fittings or weeping at the base
You are remodeling and want the heater in a different place

Replacement cost ranges

Scope of work	Typical range
Tankless to tankless, same brand family, same location	$2,000 - $2,900
Tankless to tankless, brand or vent change	$2,600 - $3,600
Gas tank to tankless, existing 3/4-inch gas line	$3,200 - $4,200
Gas tank to tankless, gas line upsize required	$4,200 - $5,500
Electric tank to gas tankless (new gas run)	$5,000 - $7,500
Old unit removal and recycling	included

Estimates, not quotes. Planning ranges for the Austin metro, permit included. Fixed quote before we start.

Replacing water heaters in Austin housing stock

Central Austin's 1950s and 1960s ranch homes usually have the heater in the garage or an interior hall closet with a B-vent through the roof. Those closets are tight, and converting them to tankless often means moving the unit to a garage wall — which is cheaper than it sounds and gets you a closet back.

The 1990s and 2000s suburbs north of the river are a different problem. Round Rock, Cedar Park and Pflugerville have thousands of two-story homes with the water heater in the attic, sitting in a drain pan above finished ceilings. Those are the tanks that cause five-figure damage when they let go. Moving that load to a wall-hung tankless unit in the garage removes the risk entirely, and it is the most common replacement we do north of Austin.

Frequently asked questions

Can you move the heater from the attic to the garage?

In most two-story homes, yes. It usually adds $400 to $900 for the water line rerouting and the new vent penetration, and it removes the possibility of a tank failure soaking your ceilings. It also makes annual descaling far easier, which matters here.

How long does a like-for-like tankless replacement take?

Three to five hours when the gas, vent and water connections all stay where they are. You will have hot water the same afternoon.

What do you do with the old unit?

We drain it, take it, and recycle it. That is included in the quote — you never end up with a tank on the curb.

Is my old unit still under warranty?

Heat exchangers commonly carry twelve to fifteen year warranties, parts five to six. Give us the model and serial number and we will check before you spend anything, and we file the claim if it qualifies.