I want to install a new gas water heater in a different location then my current Electric water heater. It will be more central to both bathrooms. The proposed location is shown in blue here:
I will be tapping into a 3/4" T, located next to and above the gas furnace, here:
The line from the T to the 90 degree elbow is 3/4". The vertical pipe is 1/2" into furnace:
The proposed gas line will run approx. 22" straight out from T, then make a right, over to far wall, then turn again toward new water heater proposed location(orange line in the top picture).
Question: Do I need to run the proposed pipe to new heater location as 3/4" pipe, then change to 1/2" for vertical run down to new heater? OR can I just reduce pipe near the T and run 1/2" pipe all the way to heater. Approximate total run of pipe would be about 40 feet.