Frequently Asked Questions

For most Orange County homes, we recommend flushing your tankless water heater once a year. Orange County water hardness typically ranges from 15 to 25 grains per gallon, which is classified as very hard by the Water Quality Association. This mineral-rich water deposits calcium and magnesium carbonate inside your heat exchanger every time you use hot water. In cities with especially hard water like Anaheim, Santa Ana, and Garden Grove, flushing every 6 months is ideal. If you have a properly maintained water softener, you may be able to extend to every 18 months. The bottom line: annual flushing is the safest default for any tankless water heater owner in Orange County.

Our tankless water heater flush is $349 flat rate, all-inclusive. That covers everything: the food-grade citric acid descaling solution, 60 minutes of circulation through the heat exchanger, inlet filter cleaning, full system inspection, flow rate testing, and a written service report with photos. There are no trip charges, no diagnostic fees, no parts markups, and no upsells. The price is the same whether you have a small Bosch point-of-use unit or a high-capacity Rinnai whole-house system. We believe tankless maintenance pricing should be transparent and predictable, which is why we publish our rate and stick to it.

We service all major tankless water heater brands including Rinnai, Navien, Noritz, Rheem, Takagi, and Bosch. Our technicians are trained on the specific maintenance requirements of each manufacturer and follow their recommended flushing procedures. Whether you have a condensing or non-condensing unit, natural gas or propane, indoor mount or outdoor mount, we have the expertise and equipment to flush it properly. Each brand has slightly different isolation valve configurations and diagnostic interfaces, and our team knows them all.

A complete flush takes 60 to 90 minutes. The core of the service is a 60-minute circulation of food-grade citric acid descaling solution through the heat exchanger, which is the time needed for the solution to dissolve calcium and mineral deposits. Before the flush, our technician isolates the unit, connects the flushing equipment, and cleans the inlet filter. After the flush, we test flow rates, check temperature differential, review error code history, inspect venting and gas connections, and document everything in a written service report. We never rush the process because a thorough flush is the only flush worth paying for.

No, flushing will not void your warranty. In fact, the opposite is true: most manufacturers including Rinnai, Navien, Noritz, Rheem, Takagi, and Bosch require annual flushing and descaling as a condition of their warranty coverage. If you skip annual maintenance and your heat exchanger fails due to scale buildup, the manufacturer can deny your warranty claim entirely. We provide a detailed written service report after every flush that includes the date, technician name, work performed, and photos of scale removed. This report serves as your proof of maintenance for warranty purposes.

Yes, we ask that an adult be present during the appointment. Our technician needs access to your tankless unit, which may be located in a garage, utility closet, attic, or mounted on an exterior wall. At the end of the service, the technician walks you through the results, shows you photos of the scale that was removed, and explains the condition of your unit. We offer flexible scheduling Monday through Saturday from 7 AM to 6 PM, including same-day and next-day appointments, so finding a time that works for your schedule is easy.

If your tankless unit has never been flushed or it has been more than two years since the last service, there is likely significant mineral scale buildup inside the heat exchanger. The good news is that our professional flushing process can remove even heavy deposits in most cases. For severely scaled units, we run additional cycles of descaling solution at no extra charge until the water runs clear. In rare situations where scale has caused permanent damage to the heat exchanger, we will be honest with you about the condition and discuss your options. The longer you wait to flush, the harder the deposits become, so we always recommend scheduling sooner rather than later.

Yes. Our annual maintenance plan locks in your flush at the current $349 rate, includes priority scheduling so you get first pick of appointment times, and we send you reminders when it is time for your next service so you never have to remember. There is no long-term contract and no cancellation fee — you can cancel at any time for any reason. Many Orange County homeowners sign up for the plan simply because it eliminates the hassle of remembering when their last flush was. Set it and forget it: we handle the scheduling so your tankless unit stays in peak condition year after year.

Orange County water hardness varies by city and water district but generally ranges from 15 to 25 grains per gallon, which the Water Quality Association classifies as very hard. Cities like Anaheim, Santa Ana, and Garden Grove tend to be on the higher end, while some coastal cities receive slightly softer water from the Metropolitan Water District. Regardless of your specific city, Orange County water contains enough dissolved calcium and magnesium to cause significant scale buildup inside your tankless heat exchanger within 12 months of continuous use. This is why annual flushing is not optional in this region — it is essential maintenance.

A properly maintained water softener significantly reduces scale formation by removing calcium and magnesium ions before they reach your tankless unit. However, even with a softener, we still recommend flushing every 18 to 24 months for several reasons. First, softeners do not remove 100% of minerals — they reduce hardness but trace amounts still pass through. Second, softener salt levels fluctuate and if the system runs low on salt for even a few weeks, untreated hard water flows directly to your tankless unit. Third, the initial bypass period when a softener regenerates allows hard water through. Annual or biannual flushing remains the safest insurance policy for your investment even with a softener in place.

The brand name is typically printed on the front panel of your tankless unit. Look for the manufacturer logo (Rinnai, Navien, Noritz, Rheem, Takagi, or Bosch are the most common in Orange County). The model number is usually on a sticker or plate on the side or bottom of the unit. If you cannot find it, take a photo of the unit and send it to us — we can usually identify the brand and model from a picture. Knowing your brand helps us arrive with the correct service documentation and any brand-specific tools, but it is not required to book your appointment.

It is technically possible to DIY a tankless flush, but most homeowners find it impractical. You need a submersible pump, a five-gallon bucket, two washing machine hoses, and a descaling solution like food-grade citric acid or white vinegar. You also need to locate and close the isolation valves on your unit, shut off gas or electric power safely, connect the pump in a closed loop, and circulate the solution for 45 to 60 minutes. After flushing, you need to purge the solution with clean water and re-open all valves without introducing air pockets. If done incorrectly, you risk leaks, air locks, or incomplete descaling that leaves deposits in the heat exchanger. For $349, our professional service handles everything and includes an inspection that catches early warning signs.

We use food-grade citric acid or white vinegar depending on the severity of scale buildup in your unit. Both are non-toxic, biodegradable, and recommended by all major tankless manufacturers. Citric acid is more effective on heavy calcium deposits because it dissolves minerals faster than vinegar at the same concentration. We never use hydrochloric acid, muriatic acid, or any harsh chemical that could damage internal components, corrode copper heat exchangers, or leave harmful residues in your water supply. After descaling, we flush the system with clean water until the pH returns to neutral.

Make sure there is clear access to your tankless water heater unit — our technician needs about three feet of working space around the unit. If the unit is in a locked garage or behind a gate, please ensure access is arranged. We will need access to the cold and hot water isolation valves on the unit (most are located directly below or beside the unit). You do not need to turn anything off in advance — our technician handles all setup. If you know where your main water shutoff is, that is helpful but not required. The whole process takes 60 to 90 minutes and you are welcome to go about your day while we work.

Yes. Every service includes a written service report that documents the date of service, technician name, work performed, descaling solution used, flow rate measurements, and the condition of your unit. This report serves as your proof of annual maintenance for warranty purposes. Most manufacturers including Rinnai, Navien, Noritz, Rheem, Takagi, and Bosch require documented annual flushing as a condition of their warranty coverage. We provide this documentation in digital format so you can save it with your home records and produce it if you ever need to file a warranty claim.