Welcome to the forum. Although you can post in any forum, the USA forum is here in case of local regs or laws
Reply to the thread, titled "What sort of price should I be paying to install a kickboard or plinth radiator and auto bypass valve?" which is posted in UK Plumbers Forums on Plumbers Forums.
We recommend City Plumbing Supplies, BES, and Plumbing Superstore for all plumbing supplies.