The manufacturers instructions show the expansion tank installed with a 'heat trap 6" minimum' drop to the side of the water heater.
I have a tall 30 gallon (< 17" diameter) water heater going in a narrow closet (< 24"). The copper cold/hot lines come up from the floor. Is there a safe way to orient the expansion tank above the water heater instead of off to the side? Also is that heat trap 6" drop before the expansion tank required?