It is always important to hire only qualified tradesmen if you want to have a water heater installation done right. There are cheaper methods to go but in the end the cheaper ways costs more. The reason for for the reason that an unqualified hot water heater installer may cause issues that will develop in the future. If the future rolls around this unqualified water heater installer will be nowhere available. At that point you will have to contact a qualified installer to make it happen right.
It is easy to discover a qualified tradesmen to install your water heater. You only need to go to a few construction sites and get the builders who they normally use. Builders will only use reputable hot water heater installers they do not have the time to waste on incompetent installations. Also, builders possess a reputation to maintain and they do not want to ruin it by hiring a sub-par installer.
Once you have chosen your qualified installer ensure that you have everything detailed on paper. When you put my way through writing there can be no misunderstandings down the road. Therefore, hire merely a qualified installer and everything is going to be fine.