| Plumbing Mechanical Services | 029 2088 6352 | | 2 Melville Terrace, Caerphilly, CF83 3HE |  Map & Directions |
| D N A Heating Ltd | 029 2088 8079 | | Graddfa Industrial Estate, Colliery Road, Llanbradach, Caerphilly, CF83 3QQ | | Map & Directions |
| E F Slarke | 029 2086 8075 | | 8 Dunraven Court , Caerphilly, CF83 2UR | | Map & Directions |
| J W Billinghurst | 029 2083 2233 | | 19 St. Annes Gardens, Abertridwr, Caerphilly, CF83 4BS | | Map & Directions |
| J A Woods | 01443 682841 | | 16 Station Road, Ynyshir, Porth, CF39 0HA | | Map & Directions |
| The Gas Safety Co Ltd | 01446 773055 | | 23 Badgers Brook Drive, Ystradowen, Cowbridge, CF71 7TX | | Map & Directions |
| Anderson & Leonard | 029 2056 0484 | | 57 Doyle Avenue , Cardiff, CF5 3HT | | Map & Directions |
| Blue Flame Ltd | 01443 207771 | | 82 Parish Road, Beddau, Pontypridd, CF38 2BU | | Map & Directions |
| W P Kelland & Son | 01443 412030 | | 24 The Oaks, Quakers Yard, Treharris, CF46 5HQ | | Map & Directions |
| Mike Carless | 029 2062 3059 | | 76 Rhydhelig Avenue , Cardiff, CF14 4DE | | Map & Directions |
| Eric Wilkins | 01656 860090 | | 10 Redlands Close, Pencoed, Bridgend, CF35 6YU | | Map & Directions |
| Morse & Simpson | 01443 228884 | | 9 Acorn Close, Miskin, Pontyclun, CF72 8SQ | | Map & Directions |
| Flowbright | 01656 725592 | | Court Colman Road, Pen-Y-Fai, Bridgend, CF31 4NE | | Map & Directions |
| Llantrisant Plumbing & Heating | 01443 223745 | | 13 Station Terrace, Pontyclun, CF72 9ES | | Map & Directions |
| Dare Heating | 01685 872657 | | Belmont, Gower Road, Aberdare, CF44 0LE | | Map & Directions |
| Thompson Services | 029 2025 4738 | | 8 Southminster Road, Cardiff, CF23 5AT | | Map & Directions |
| Premier Heating | 01656 871382 | | Llyston, Llangeinor, Bridgend, CF32 8PB | | Map & Directions |
| Burner Efficiency Services | 029 2057 8848 | | Unit 13, Station Terrace, Ely Brewery Workshops, Ely, Cardiff, CF5 4AR | | Map & Directions |
| J Hawkins | 01443 224176 | | 37 Westhill Drive, Llantrisant, Pontyclun, CF72 8DX | | Map & Directions |
| Colin James | 01446 772725 | | Old Police Lodge, Sutton Road, Llandow, Cowbridge, CF71 7PA | | Map & Directions |
| B E Dobson & Son | 029 2075 1656 | | 4 Hampton Crescent West, Cardiff, CF23 6RB | | Map & Directions |
| M D Cassley | 029 2077 8395 | | 6 Lynton Close, Llanrumney, Cardiff, CF3 4BU | | Map & Directions |
| Graham Yeo Plumbing & Heating | 01446 743627 | | 41 Broad Street, Barry, CF62 7AD | | Map & Directions |
| Action Heating & Plumbing Services | 01685 873288 | | 5 Alexandra Terrace, Abernant, Aberdare, CF44 0RG | | Map & Directions |
| T S Creedon Ltd | 029 2034 0801 | | 29a Bruce Street, Cardiff, CF24 4PJ | | Map & Directions |
| Stadium Plumbing & Heating Services | 029 2049 8222 | | 77 Ty Cerrig, Cardiff, CF23 7DQ | | Map & Directions |
| Heating & Plumbing Warehouse Ltd | 029 2046 1964 | | Unit 6a, East Tyndall Street, Jubilee Trading Estate, Cardiff, CF24 5EF | | Map & Directions |
| Thistle Utilities | 029 2084 2080 | | 1 Station Road, Radyr, Cardiff, CF15 8AA | | Map & Directions |
| Jb Plumbing Services | 01446 753753 | | Church Lane, St. Athan, Barry, CF62 4PL | | Map & Directions |
| C O'donoghue | 029 2030 6636 | | 12 Woolacombe Avenue , Llanrumney, Cardiff, CF3 4TE | | Map & Directions |
| On Site Plumbing Ltd | 01656 646573 | | Heol Ffaldau, Brackla Industrial Estate, Bridgend, CF31 2AJ | | Map & Directions |
| Celtic Gas | 01656 649482 | | Unit 22, Crosby Yard, Bridgend, CF31 1JZ | | Map & Directions |
| P J Bool | 029 2056 8933 | | 19 Mylo Griffiths Close, Cardiff, CF5 2RQ | | Map & Directions |
| A Bainton | 029 2048 8930 | | 85 Llanedeyrn Road, Penylan, Cardiff, CF23 9DU | | Map & Directions |
| Lane & Prothero Gas Services | 029 2062 6349 | | 209 Hillrise, Cardiff, CF23 6UQ | | Map & Directions |
| D L M Plumbing & Heating Services Ltd | 029 2045 6006 | | 4 Queenwood, Penylan, Cardiff, CF23 9LE | | Map & Directions |
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