[Kopy kat]

Although I filled my tankless water heater with antifreeze, the mechanical freeze valve did it’s thing and opened up at it’s set low temp and self-drained the unit.

The question now is do I have to replace this thermo-plastic valve, or does it close itself back up when the air temps rise?

I haven’t found anything about this in the owners manual, other than saying that it is there.

Anybody have an idea?

Thanks, Larry