Originally Posted by
Rick Hurst
Michael has probably the right idea. They hooked up the line to be able to flush out the primary condensate drain line periodically instead of having to pay out the 175. to the HVAC man to do so.
Rick, did you see my post above? With all due respect, the green handle is the shut-off for the main feed to the water heater. There is no shut-off handle for the smaller tee so how would that work for flushing?
I'm 99.999% certain this is a Watts combo shut-off & pressure relief valve.