1) First thing in the morning my "cold water" comes out warm at the kitchen sink. Not just the "not cold" that the stuff that has sat in the pipes overnight feels like, this is water is warmer then room temperature. When I look at the piping, that cold water pipe runs immediately over the HWH. Kitchen sink is up one level, and about 10 feet away from the HWH. I am guessing the heat is rising from the water heater as if cycles on overnight, and heats the water. When this was first installed, and we were only using the water minimally in the house due to the remodeling then the water would come out (of the cold) very hot. We told the plumber about it then , of course he did not believe it until he felt it one morning, then he mumbled something about fixing it, and went downstairs. Not sure what he did, but it was only marginally less of a problem. Now we use the water daily, it is much less warm(sits in pipe less time, so it does not have time to heat up as much, I am guessing) but it definitely is warm. My questions are this-- Is this a common problem? Should the cold water line be routed in a different way so this does not occur? If it is set-up wrong, where can I find a definitive source so I can give a reference to my plumber when I ask for it to be fixed ("some guy on the internet said so" is not a good reason to give a tradesman.)
My second issue, when that baby comes on it vibrates the floor in the kitchen (right above it) It also rattles the license plates hanging from the ceiling in the basement. I have looked and some copper pipes coming out come in direct contact with the wood joists. Common sense tells me that there may be a better way to install this so rigid appendages coming off from it do not transmit vibration directly to the frame of the house. Again any authoritive source on this would be great, so I can try to convince him to address this issue.