Looking to get started on flushing your tankless water heater on your own? Isolation valves are a crucial part of the flushing process, but there’s a chance your tankless water heater doesn’t have these valves. Luckily, it’s totally possible to still flush your tankless water heater without isolation valves under certain conditions.
The major deciding factor as to whether or not you can flush your tankless water heater comes down to its water line connections. If the tankless water heater has flexible hot and cold water line connections, it can be flushed without isolation valves. But if the connections to the tankless water heater are pipe only, then isolation valves are required.
If your tankless water heater doesn’t have isolation valves but has flexible water line connections, watch this video to get step-by-step instructions on completing a tankless water heater flush.
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