Is that a garden hose thread that I hook to for water supply?
Answer Hello Richard. No, this model does not use a garden hose fitting. It uses a 1/4" water line.
There are two lines to conect to the water filter housing. One ic clear, the other is an orangish- off color line. Which one is for the in nozzle?
The one that goes to the in nozzle is the one that is attached to the single water valve. Where the water supply connects to the unit there is a water line that comes off that valve and that would be the one that goes to the in nozzle. Unfortunately we do not know what color the line would be.