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HW Radiator Piping Options?
Hello, I would like to get another opinion on this question: We are using new replacement slenderized tube radiators for a hot water system. (6 tube, various sizes). We see on the cutsheet/catalog page that the recommended piping is to use the bottom taps for both supply and return. While this makes sense, we have a few upfeed radiators, where due to existing conditions, the plumber cannot fit the elbow so close to the rad. to use the bottom connection on both ends (limited by ex. radiator enclosures). Question is, what would happen if we did the following, Supply in the top, and Return out the bottom (on opposite end of course). I suspect it would work similar, but curious if anyone has experience with this before? In addition, Contractor has asked if they can use Top supply, and Top Return, however, in my opinion, this could derate the radiator quite a lot? DO you agree? Appreciate any help anyone can provide.