APHC - The Association of Plumbing and Heating Contractors in England and Wales operating a licensed plumber system to ensure consumer protection. - http://www.aphc.co.uk/
Heatforce (Wales) Ltd - Provide a central heating installation services by Corgi registered engineers. Company profile and contact information. - http://www.heatforce.co.uk
A W Heating - Offer central heating and bathroom installation services. Contact form and examples of services. - http://www.a-w-heating.co.uk
J.T.S Gas and Electrical Services. - Offer domestic gas, electrical repairs, installation and servicing for all domestic gas appliances. Based in Yorkshire. Contact details. - http://www.jtsgas.co.uk/
DrainSurgeon UK Ltd - Installation, maintenance and surveying of sewage treatment systems, septic tanks and all types of drainage systems. - http://www.drainsurgeon.co.uk/