I am looking to install electric shower.there is no tank in roof space gas heating was fitted a while back.gas boiler is down stairs with all pipes connected to it.I have adentified the mains water pipe going into boiler.is it just a matter of connecting into mains water pipe as normal and running pipe to shower unit. And do I just turn water off as normal for mains water supply or do I need to drain boiler.any advice would be great thanks.patrick
