Tankless Water Heater Installation in Phoenix, AZ — Endless Hot Water, No Tank

Tankless is a good fit for a lot of Phoenix homes, but only when it is sized and vented correctly. Done right, you get hot water for as long as you need it and no tank sitting in the garage waiting to leak. We tell you up front what your house needs so there are no surprise change orders.

When You Need Tankless Water Heater Installation

Think about tankless when your tank is due for replacement anyway, when your household runs out of hot water during back-to-back showers, when you want the garage or closet space back, or when you want to stop worrying about a tank failing while you are away.

Tankless units have no stored water to leak and they last longer than a tank when they are maintained. In Phoenix that maintenance matters, because hard water scales the heat exchanger. We install isolation valves on every unit so the system can be flushed easily, and we can pair it with a softener to slow scale down.

Our Tankless Water Heater Installation Process

We start with a load check: how many fixtures may run at once, the incoming water temperature, and your gas meter and gas line size. Many tankless units need a larger gas line or a dedicated run, and skipping that step is the most common reason a unit underperforms.

Install day, we remove the old heater, mount the unit, run correct stainless or PVC venting per the manufacturer, upsize gas or run new electrical as needed, add isolation and flush valves, and set condensate drainage on condensing models. Then we test flow and temperature at each fixture, register the warranty, and show you how to flush it. Most installs take most of a day.

Tankless Water Heater Installation Cost in Phoenix

Tankless price depends on unit size, whether gas line or venting has to be upgraded, where the unit is mounted, and whether you add a recirculation loop or softener. You always get a flat price in writing before any work starts, so nothing changes at the end. There is no trip fee, and we do not charge extra for evenings or weekends. If we open things up and find more damage, we stop, show you what we found, and let you decide. Call 602-842-2344 and we will explain what your job will likely involve.

Why Choose Us

We quote the whole job, gas and venting included, so the price you get is the price the install actually takes. Roman Flow Plumbing is owner-operated, so the person who picks up the phone is the person who works on your home. We are a licensed, bonded, and insured Arizona plumbing contractor (ROC #357355), and every job is backed by a warranty on parts and labor. Most Phoenix and West Valley calls get same-day service, and we answer the phone 24/7 when water is running where it should not be.

Tankless is one path within our Water Heater Services in Phoenix, so ask us to compare it against a standard tank for your home.