I bought a GE whole home water filter to install (GXWH35F) and am trying to figure out which one of these lines I need to install it on. I'm guessing the red pipe is hot water out of the heater. I was expecting a line in and two lines out but this is all I can see. Both pipes run behind the water heater and under the house.
Finally, the filter is meant to be mounted to the wall. Could I reroute these pipes to run horizontal and then back down to install the filter?