Tankless units leak in different places than tanks — heat exchangers, condensate drains, and high-pressure fittings. We know exactly where to look.
Tankless water heaters are popular in newer Colton homes and remodels because they save space and deliver endless hot water. But when one leaks, the diagnosis is a different animal: instead of a big steel tank, you're dealing with a compact heat exchanger, a maze of high-pressure fittings, and a condensate drain that has to stay clear.
We service all major tankless brands and models. The most common leak sources we see in the Inland Empire are condensate drain blockages (our hard water leaves mineral buildup fast), loose or corroded water connections from thermal cycling, and — in older units — pinhole leaks in the heat exchanger itself. Each has a very different fix, and getting the diagnosis right the first time saves you real money.
Colton's water supply carries significant mineral content, and tankless heat exchangers are sensitive to it. Scale buildup raises internal pressure and temperature, stressing seals and fittings until they weep. If your unit hasn't been descaled in the last year or two, a leak is often the symptom — and a professional flush is part of the lasting fix, not just the repair.
We power down and isolate the unit, pressure-test the water connections, inspect the heat exchanger and condensate system, and clear or repair the drain line. Fittings get resealed or replaced with proper high-temperature components, and we run the unit through full heating cycles to confirm the leak is gone before we sign off.
Family-safety note: Tankless units can produce extremely hot water on demand — we verify the outlet temperature and, in homes with young children, recommend enabling any built-in temperature limit or adding a mixing valve to cap delivery at a safe 120°F.
| Service | Representative Price Range |
|---|---|
| Tankless leak diagnosis / service call | $89–$149 |
| Minor tankless leak repair (fittings, condensate) | $150–$400 |
| Descaling flush + leak service | $200–$400 |
| Heat exchanger replacement (when available) | $300–$600 |
Representative market ranges for the Colton area — final pricing depends on heater type, access, and parts. Owner to verify. Call (833) 713-2101 for an upfront quote.
We service all major residential tankless brands — gas and electric. Bring us the model number when you call and we'll confirm parts availability before the visit.
Heat exchangers often carry long warranties (10–15 years), though labor usually isn't included. We can document the failure for a warranty claim and handle the repair either way.
With our local water hardness, once a year is the safe cadence. Skipping it is the number-one cause of the pressure problems that lead to leaks.
If the heat exchanger itself is compromised on a unit over 12–15 years old, replacement usually wins. Fitting and condensate issues are almost always worth repairing at any age.
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Water Heater Leak Repair Specialists