Tankless Water Heater Installation in Frisco, TX
Hot water that doesn't run out, a unit that should last around 20 years, and your garage floor back.
We handle tankless water heater installation throughout Frisco — both new installs and tank-to-tankless conversions. Our shop is next door in Little Elm, we're a registered Frisco contractor, and the gas line is in our quote, not a change order later
Master Plumber M-46550 · Licensed & Insured · Open 24/7
Why Frisco Homeowners Are Switching Now
Most of Frisco was built in a short window, so a lot of original water heaters are reaching the end of their lives at the same time. When you’re replacing anyway, it’s the natural moment to price a tankless — you’re paying for an installation regardless.
What you get for the difference:
- It doesn’t run out. Back-to-back showers with laundry running
- Around 20 years against 8 to 12 for a tank
- Wall-mounted, roughly carry-on sized, freeing real garage space
- No tank failure flood. When a tank fails it puts 40 to 50 gallons on your floor. A tankless holds almost none
The Gas Line — Ask Every Quote About This
If two tankless quotes are thousands apart in Frisco, this is almost always why.
A tankless unit needs roughly four to five times the gas flow of a tank. A whole-house gas tankless typically calls for 150,000 to 199,000 BTU per hour. Your existing tank draws around 30,000 to 40,000.
The gas line in your house was sized for the tank. In most Frisco homes it’s undersized for tankless and has to be upgraded.
That work is required, not optional. Some quotes include it. Some leave it out, get your old unit off the wall, then come back with a change order when you have no hot water and no leverage.
Just ask each company whether the gas line upgrade is in their number. If they haven’t looked at your gas line, they can’t answer — which tells you something too.
It matters afterwards as well. An undersized gas line is a known cause of flame failure codes, so a conversion done cheaply becomes a service call later.
Frisco Permits and Inspections
Frisco is stricter than most cities nearby, and it works in your favour when you hire properly.
A tank-to-tankless conversion needs both a plumbing permit and a gas permit. Not one.
Frisco also requires contractors to be registered and current before most permits can even be submitted, and verifies plumbing licenses through the Texas State Board of Plumbing Examiners. We’re a registered Frisco contractor, verified April 2026 — you can check us, or anyone, in the city’s eTRAKiT system before you hire.
Inspections are requested online through eTRAKiT and have to be submitted before 7 a.m. on the day. We handle the permits and the scheduling.
Getting the Size Right
Sized properly, you stop thinking about it. Sized on a rule of thumb, you notice every January.
A tankless doesn’t store hot water, so capacity isn’t gallons — it’s how much water it can bring up to temperature at once. Two things set that: how many fixtures you run at the same time, and how cold your incoming water is.
Incoming water is far colder in winter than summer, so we size for January. Frisco homes average over 3,000 square feet and often run two showers at once in the morning — that’s a different unit than a small single-bathroom house.
Keeping It Running
Tankless needs more maintenance than a tank, not less, and here it matters.
Frisco’s NTMWD supply runs around 11 to 12 grains per gallon. A tankless heat exchanger moves water through narrow passages, so minerals build faster there than in a tank.
One descaling a year is what separates a 20-year unit from an 8-year one. A water softener slows buildup, and a maintenance plan means the flush actually happens.
Upfront Pricing
One written price before we start, gas line and venting included, options priced separately so you can see the difference. Priced by the job, not the hour. Financing available.
Frisco Tankless FAQs
Will my gas line need upgrading?
On most tank-to-tankless conversions in Frisco, yes. Tankless needs four to five times the gas flow, and existing lines were sized for the tank. We check the line and the meter before quoting so the number we give you is the number you pay.
Do I need a gas permit as well as a plumbing permit?
Yes, for a tank-to-tankless conversion Frisco requires both. We pull them and request the inspection through eTRAKiT.
Can the tankless go where my tank is now?
Often, but not always. Tankless units are wall-mounted and have different venting and clearance requirements, so the best location isn’t always the old one. Sometimes moving it shortens the gas run and reduces cost.
How do I check that a plumber is registered in Frisco?
Frisco requires registration before most permits can be submitted and publishes registered contractors through eTRAKiT, where you can also track your permit and inspection. We’re registered, verified April 2026.
How long does the installation take?
A straightforward conversion is usually a day. If the gas line needs running back a long way, or venting has to be rerouted, it can go into a second day. We’ll tell you which yours is before we start.
Is it worth it if I just need a water heater?
Depends what you want. If you run out of hot water regularly or want the space, yes. If your tank works fine, a straight replacement is usually better value. We’ll price both.
Want a Complete Tankless Quote in Frisco?
We’ll size it for winter, price the gas line honestly, and pull both permits.
