Where do you start when it comes to central heating in manchester? do you need a gas or oil powered system? what’s the best type? The boiler at your property must have a power output of less than kw/hr and be fired by natural gas (and not lpg, electric or oil). Hire London boiler repair services now! Mon – fri: am – pm, sat: am – pm. Dump the hot water down the drain so that it can melt away some of that grime and any hardened grease if this method appears to work for the clog, continue doing.