Good, a question maybe something silly but, the issue is like that, I have a heater of 14 lts. at home and I have to change it, I thought to put a bigger one to give me more hot water since I have to use it to the fullest all the time because I have a pressurizing pump connected (so that the water reaches the bathroom on the top floor) and Then, as the water passes so quickly, something cold comes out in the lower part of the house. That's why I planned to put a bigger one, but it comes with a 5 "spout and the one I have is 4" and I didn't want to break everything to change it since it is embedded in the wall to the ceiling. Does any adapter come? should it Thank you!