some pics for
@Seamaiden of my hot water tank re-purpose its called an air vent,tried to get a good pic with the info on it here
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like i said its mounted to one of the 2 inlets on top and the other spot is where my r/o and a/c water drains in
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and you just need to cap off this drain on the side of the tank,its the pressure valve that usually leaks on older tanks lol.
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and i lil look at my shotty plumbing work,the blue line is the r/o coming in,during summer i shut it off and open that ball valve and my a/c drains in so i really dont use r/o during summer,just a/c reclaim :)
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when its full the extra a/c water just goes past that tee and outside to a very large maple tree.peace