When Maria from Cypress called Repipe Solutions Inc last spring, she was furious. Her 18-month-old, $2,800 tankless water heater had just failed completely, leaving her family without hot water on a Sunday morning. The unit was still under warranty — but the warranty claim was denied. Why? Because of a $4 maintenance step that took 30 minutes, that she had never even heard of. Here’s the story every Houston homeowner with a tankless unit needs to read.
The Mistake
Maria had never descaled her tankless water heater. Not once. Her installer mentioned it briefly on install day, handed her a one-page printout, and that was the last time anyone thought about it. Eighteen months later, Houston’s brutal hard water had coated the heat exchanger with so much calcium scale that the unit’s flow sensor failed, the burner overheated, and the control board fried. Total damage: a $2,800 unit that had to be replaced.
What She Should Have Done
Every tankless water heater in Houston needs to be flushed with a descaling solution once a year. The process requires a small pump, two buckets, a gallon of food-grade citric acid or white vinegar (under $4), and about 30 minutes of runtime. That’s it. Done annually, this single task extends tankless water heater life from roughly 8 years in Houston’s hard water to the full 20+ year manufacturer rating.
The Kicker
Every major tankless manufacturer — Rinnai, Navien, Noritz, Rheem — requires annual descaling as part of the warranty terms. Skip it, and your warranty is void the day the unit fails. Maria’s installer had technically told her. She had technically signed the paperwork. But nobody had emphasized just how critical that one step was.
Why Houston Specifically
Our municipal water runs 10 to 18 grains per gallon of hardness — classified as hard to very hard. Cities with softer water can sometimes skip a year of descaling without serious damage. Houston cannot. Every tankless unit in the Greater Houston Area needs annual service, period.
How Repipe Solutions Inc Can Help
Repipe Solutions Inc offers annual tankless flush service for a fraction of the cost of a new unit. We also install whole home softeners that reduce scale buildup to nearly zero. Protect your investment. Call us today at 832-662-4288.
Bonus Tip
Check whether your installer added isolation valves during the original installation. These are two small valves with hose ports (often red and blue) that make annual flushing possible in under 30 minutes. Without them, a flush becomes a 2-hour job requiring the unit to be disconnected. Adding isolation valves after the fact runs $150 to $250 and pays for itself the first time you flush.