You will require this licence if you intend to contract, sub-contract and / or advertise to carry out any of the following categories of specialist work as a company or partnership: plumbing, water plumbing, draining, gasfitting, LP gasfitting and advanced LP gasfitting work (including domestic, commercial or industrial). Your licence will specify what categories of specialist work you are authorised to perform.
Plumbing includes water plumbing, roof plumbing and works of sewerage. Water plumbing includes plumbing involved in a fire service such as a fire sprinkler system, urban irrigation, and water supply. Water supply includes any work on pipes and fitting in a building in which any part of a sewerage service is connected to a septic tank or effluent system.
Gasfitting includes work on a gas installation (other than an autogas installation) connected or intended to be connected to a compressed natural gas container.
LP gasfitting work is restricted to work on a gas installation designed to carry liquefied petroleum gas in vapour phase only at pressures not exceeding 150 kilopascals.