We have hot water radiant heat in our house. After having our bathroom re-tiled, the radiator now sits 3/8" higher than previously so the two pipes coming out of the floor are 3/8" too short. I cannot remove the 3/4" steel pipes, because I do not have access to the other ends. A male/female coupling extends the pipe too much (about an inch) and I do not want to put the radiator up on blocks. I also do not want to cut the legs of the radiator to shorten it. Is it possible to cut the threads off of the supply and return pipes and place a brass (or steel) fitting on the end that is a compression fitting for a 1" OD pipe and has a 3/4" NPT fitting on the other end?