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- 6 Mar 2021
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We had a old double rad that was from the 70s 1500mm and we had a extension built and needed a radiator in it so what I did was took the the old radiator out and putting a single 1400mm and a single 1200mm in the extension I run the feed into the 1400mm out then into the 1500mm the 1500mm is not getting as hot but the pipe to the rad is very hot