Should home-buyers have a professional plumbing inspection done? Let us know how you get on in the. What type of tradesperson do you need? We can use the combined boiler or an accumulation tank with a copper flow heater to heat up hot service water (see the price list). Experienced heating, gas engineer offers services: - boiler breakdown, service, installation - gas hob, gas cooker replacement - hot water cylinders repair, service, installation - gas fires - landlord.