Ok thank you for your advice, when my father built his house he done all the pluming and electric him self 15 years ago but never has done a Hmo so was not sure if it was the same procedure or not.
Hi all I have a hmo with 5 en-suites and am not sure what pipes for central heating and shower pipes to use to supply to the whole house without loosing pressure, it’s my first project and would like to get your advice, kind regards .Mick