Welcome to the forum. Although you can post in any forum, the USA forum is here in case of local regs or laws
So would I be correct in saying if it's left in place all that has to be done would be drain the back boiler and then drill a few 6mm holes in it, and that's job done.Jut left as a feature and not useable?
Reply to the thread, titled "Gas boiler installation" which is posted in Boiler Advice Forum on Plumbers Forums.
We recommend City Plumbing Supplies, BES, and Plumbing Superstore for all plumbing supplies.