How to Flush Tankless Water Heater

Posted by on July 22, 2013 in Plumbing | 0 comments

How to Flush Tankless Water Heater

Rinnai Tankless Water HeatersA tankless water heater is, as the name would suggest, a water heater without a tank. However, they must still be flushed on a regular basis to ensure that they continue to work properly and to prolong their working life. Most modern tankless water heaters will have a special indicator light that will let you know when it is time to flush it out. The reason that a tankless water heater needs to be flushed is because calcium and other minerals in the water build-up over time and can cause clogging and other issues, if not addressed routinely and promptly.

Before flushing your tankless water heater, you will need to turn it off. This will usually mean turning off the circuit that runs your hot water heater, or turning your hot water gas valve to the pilot switch. Next, you’ll need to look for the drain spigot, which is located at the bottom of the water heater. Attach a common garden house to the end of this spigot and lead the other end of the house into the yard or into a container that can be emptied out. You will then need to turn off the shut-off valve for cold water to make sure that water, cold or otherwise, does not enter the heater while you are flushing it out. Next, open the pressure relief valve, which will usually be located at the top of the heater.

Now you can begin to flush the heater. Open up the drain valve attached to the garden hose you have hooked up. The calcium, minerals and other build-up inside the heater will drain until water stops running from the garden hose.

When water no longer runs from the house, you can detach the hose, turn off the pressure valve, and put your tankless water heater back into running order.

Posted from Jonesboro, Georgia, United States.

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