The flush visit
The flush, step by step
A flush rinses the scale out of the heat exchanger. It takes one visit and one heater.
- 01
Step 1: We shut it down
Gas, power and water go off, and the isolation valves are closed so nothing moves while we work.
- 02
Step 2: We hook up
Hoses go onto the service ports and a small pump goes in line with a bucket of descaling solution.
- 03
Step 3: We circulate
The solution runs through the heat exchanger for as long as the heater and the scale call for.
- 04
Step 4: We rinse
Clean water runs through until it comes out clear. We clean the inlet filter screen too.
- 05
Step 5: We restart and check
Valves open, the heater restarts and we look for leaks. We read the flow, the temperature and the error history.
- 06
Step 6: We leave a note
You get a written note of what we found and the date to flush next.
Signs
Signs scale is building
None of these proves it on its own. Together they are a good reason to book.
Lukewarm water
The heater runs, but the water never gets as hot as it did.
Error codes
Many heaters show a code when flow is restricted. Your manual says what yours means.
A louder heater
Rumbling or popping while it runs can mean scale in the heat exchanger.
Crust on fixtures
White crust on the showerhead or the faucet means the same minerals are in the heater.
Plan it or wait
A scheduled flush against waiting for a code
Both end with a visit. One is on your calendar.
| Waiting for a code | A yearly flush | |
|---|---|---|
| What the visit is for | Waiting for a codeFind out why the heater stopped | A yearly flushClear scale before it builds |
| When it happens | Waiting for a codeWhenever it fails | A yearly flushA date you picked, with a text reminder |
| Hot water meanwhile | Waiting for a codeFading, then gone | A yearly flushSteady |
| The bill | Waiting for a codeA service call, plus parts if something wore out | A yearly flushOne planned visit |
Questions about the flush
How often should a tankless heater be flushed?
Once a year is the usual interval, and more often in very hard water. Your heater's manual sets the maker's interval, and that one comes first.
What solution do you use?
A descaling solution made for water heaters, run through the heat exchanger and rinsed out. We follow the label on the product and the heater maker's instructions.
Can I flush it myself?
Some owners do, if the heater has valves and the manual describes the steps. If you'd rather not handle gas, power and hot water, we'll do it.
What if the flush doesn't fix it?
Then we tell you what we found and quote the repair in writing. Nothing more happens until you say yes.
Ready to book?
One visit, one heater. Or join the Flush plan and we'll text you every year.