Attach a hose to the drain valve.
Clr to clean tankless water heater.
Open the drain valve after unscrewing the water supply line and allow sufficient time for the water to drain out of the heater into the basin.
Turn off the power source for your tankless water heater.
How to clean a hot water heater with clr step 1.
Again turn hot water valve back on.
Tankless coil clogging diagnosis repair removing lime scale from a tankless coil water heater also for side arm.
And water heater scale de liming procedure for diagnosis and repair procedures.
Once the water has drained close the valve.
Keeping the hose as straight as possible put the other end of the hose over a.
Step 3 pour in the cleaner.
You should find the small screen on an underside of your tankless water heater that can remove a screw.
You can buy food grade white vinegar in bulk online or in certain stores.
If the water heater is indoor be sure to place the bucket beneath the flow of the water.
Pull this out and check that is it now clean.
If you need to you can buy a tankless water heater cleaning kit.
Open the drain valve and unscrew the.
This prevents cold water from flowing.
See water pipe clog diagnosis.
Run the hose end to a basin where you can collect hot water.
Play pause space step 2.
Never use any other kind of vinegar as it can damage or stain the system and you shouldn t use chemicals as they can remain in the water and harm your health.
Use 2 5 gallons 9 46 liters of undiluted white vinegar to clean your tankless water heater at all times instead of chemical solutions.
Clr type products can be harsh on the copper heat exchanger within the water heater.
Since your tankless water heater is most likely the source of all your drinking water and bathing water using chemical cleaning solutions may be extremely harmful to your health.
Let the water that is left to run out.
We recommend a 60 minute flush using a white vinegar as the descaling material advises fleming.
How do i flush clean my rinnai tankless water heater.
Close turn off the three water valves attached to your tankless water heater.
Water supply pipes may be clogged at the water heater or at other locations from minerals soil or other debris.