I want to install an unvented hot water cylinder and system boiler. I have been recommended that I should upgrade my mains water pipe using a mole, to make the most of the system. Affinity Water have said they don’t do this and I need to contact a private plumbing to use a mole to install the new pipe. Is this correct? So what do I need to ask Affinity to do? Presumably we will need to install a new 32mm pipe? Can someone also advise on all other pipework I need to request to ensure the rest of the system is sufficient with the correct pipework? I was hoping I could leave the mains as it is, and install the new system and see how it works. If the mains need upgrading surely I can do that afterwards? This is all new to me, so an overview of the process would be really helpful!