Call 682-284-0966 for same-day tankless service. We install and repair tankless systems across Plano, Allen, Frisco, McKinney, and the North Dallas area.
Texas Master Plumber License #M-17697. Serving Plano since 1990.
Is Tankless Right for Your Home?
Tankless is the right choice when: You want endless hot water, the current water heater is in a tight space, you’re planning to stay in the home 10+ years, your gas service can support the increased BTU load, and you have adequate venting options.
A quality tank unit may be the smarter buy when: You might move in 3–5 years (tankless payback typically takes 8–12 years), your gas line would require significant upsizing ($400–$1,500 additional), budget is the primary constraint.
The Gas Line Issue Nobody Warns You About
This is the #1 source of surprise costs in tankless installation — and it’s 100% avoidable if addressed upfront.
A standard 40–50 gallon tank water heater draws approximately 40,000 BTU/hr. A whole-home tankless unit draws 150,000–199,000 BTU/hr — roughly 4–5 times more. Your existing gas line was sized for the tank. Before committing to a tankless quote, we evaluate: the existing gas line diameter, the meter regulator capacity, the total BTU load of all gas appliances, and whether the meter itself is rated for the increased demand.
Typical gas line upsize cost: $400–$1,500. No surprise invoice mid-job.
Rinnai vs. Navien: The Real Comparison
Rinnai: Strongest parts availability across DFW. Longest proven track record in North Texas conditions. Industry-leading warranty (12-year heat exchanger on Sensei series). Best for most Plano homes.
Navien: Built-in recirculation pump on premium models. Typically delivers more BTU per dollar. 15-year heat exchanger warranty on NPE-2 series. Best for homes where recirculation is a priority.
Annual Descaling: Non-Negotiable in Plano
Plano’s water at 15–20 GPG builds scale inside tankless heat exchangers faster than almost any other metro in the country. This is what makes the difference between a unit that performs at 20 years and one that degrades visibly by year 5.
We flush the heat exchanger with a food-grade descaling solution circulated for 30–45 minutes. The scale dissolves and flushes out. Annual descaling cost: $200–$400.
The manufacturer’s warranty on most Rinnai and Navien units requires documented annual maintenance. Skipping it gives the manufacturer grounds to decline a warranty claim on a heat exchanger failure.
Tankless Water Heater Repair
Common Rinnai error codes: 10/11 (ignition failure), 12 (flame loss), 32 (outlet thermistor), 52 (modulating gas valve).
Common Navien error codes: E003 (ignition failure), E012 (flame loss), E016 (overheating — often scale), E110 (vent obstruction), E407 (flow sensor).
Don’t cycle power repeatedly — note the code and call. We identify the cause before closing the call.
What Tankless Installation Costs in Plano (2026)
| Service | 2026 Cost Range |
|---|---|
| Whole-home gas condensing tankless install | $3,200 – $5,500 |
| Gas line upsize (when required) | $400 – $1,500 |
| Annual descaling service | $200 – $400 |
| Igniter / flame sensor repair | $150 – $400 |
| Flow sensor replacement | $200 – $400 |
| Heat exchanger replacement | $800 – $1,500 |
| Gas valve replacement | $300 – $600 |
Federal Tax Credit & Utility Rebates
The federal Energy Efficient Home Improvement Credit covers qualifying gas condensing tankless water heaters at 30% of project cost, up to $600 per year. Most current Rinnai and Navien condensing models qualify. We provide the manufacturer’s documentation you’ll need to claim the credit.
Service Area
Plano, Allen, Frisco, McKinney, Richardson, Murphy, Wylie, Sachse, Lucas, Parker, Fairview, The Colony, Prosper, Celina, Garland, Carrollton, Rockwall, and East Dallas.