| Lear Mechanical Services | 028 7778 1700 | | 184 Learmount Road, Park, Londonderry, BT47 4BA |  Map & Directions |
| J Hinds | 028 4277 1652 | | 15 Dunevly Road, Portaferry, Newtownards, BT22 1NB | | Map & Directions |
| Kearns Mechanical Services | 028 6773 8800 | | Hillview House, Aughanhinch, Newtownbutler, Enniskillen, BT92 0GY | | Map & Directions |
| Action Plumbing & Heating | 028 9061 0944 | | 26 Oakhurst Avenue, Belfast, BT10 0PE | | Map & Directions |
| James Davey | 028 9023 5919 | | Unit 21, Westlink Enterprise Centre, 30-50 Distillery Street , Belfast, BT12 5BJ | | Map & Directions |
| P A Donaghy | 028 8775 8601 | | 95 Sluggan Road, Pomeroy, Dungannon, BT70 2UP | | Map & Directions |
| Jcl Plumbing & Heating | 028 9266 1156 | | 8 Ballyknocken Avenue, Lisburn, BT28 1SG | | Map & Directions |
| J P Beatty | 028 3834 8458 | | Unit 4 Cido Business Complex, Charles Street, Lurgan, Craigavon, BT66 6HG | | Map & Directions |
| R J M Heating & Plumbing Services Ltd | 028 9146 6461 | | 11 Westmorland Crescent, Bangor, BT20 3LX | | Map & Directions |
| Coast Line Mechanical Services | 028 7775 0322 | | 16 Limestone Road, Limavady, BT49 0LB | | Map & Directions |
| Thomas Magill | 028 4372 2829 | | 133 South Promenade, Newcastle, BT33 0HA | | Map & Directions |
| Curran Heating & Plumbing | 028 9060 3130 | | 112 Trench Park, Belfast, BT11 9FG | | Map & Directions |
| Cassidy Bros | 028 2954 0057 | | 29 Lismoyle Road, Kilrea, Coleraine, BT51 5UH | | Map & Directions |
| Russells | 028 9751 1040 | | 25 Lessans Road, Saintfield, Ballynahinch, BT24 7HD | | Map & Directions |
| D & E Gray | 028 9083 3320 | | 60 Street Annes Crescent , Newtownabbey, BT36 5JZ | | Map & Directions |
| Pipeline Services | 028 9037 0662 | | Unit 22, Dargan Crescent, Somerton Industrial Park, Belfast, BT3 9JB | | Map & Directions |
| M Nugent | 028 8775 8617 | | 2 Tandragee Road, Pomeroy, Dungannon, BT70 3DS | | Map & Directions |
| E Doherty | 028 7126 5436 | | 7 West End Terrace, Londonderry, BT48 9EW | | Map & Directions |
| Sean Mccaugherty | 028 9756 5455 | | 35 Cumber Road, Drumaness, Ballynahinch, BT24 8SG | | Map & Directions |
| M Millar | 028 9446 9382 | | 202 Belfast Road, Muckamore, Antrim, BT41 2EY | | Map & Directions |
| K P Mclaughlin | 028 7776 5476 | | 25 New Line Road, Limavady, BT49 9NF | | Map & Directions |
| Smyth & Walker | 028 9335 1837 | | 2 Hillview Avenue , Carrickfergus, BT38 8YP | | Map & Directions |
| Armstrong Plumbing | 028 9267 6875 | | 113 Saintfield Road, Lisburn, BT27 5PA | | Map & Directions |
| H Allen | 028 3835 9313 | | 181 West Street , Portadown, Craigavon, BT62 4BT | | Map & Directions |
| P & E Services | 028 9083 7564 | | 111 Church Road , Newtownabbey, BT36 6HG | | Map & Directions |
| Allen Mechanical Services | 028 9269 9606 | | 37 Villa Wood Road , Dromore, BT25 1LG | | Map & Directions |
| T J Mcconnell & Sons | 028 7136 9161 | | 32 Balliniska Road, Londonderry, BT48 0NA | | Map & Directions |
| A W Olphert | 028 7184 1485 | | 117 Dunnalong Road, Bready, Strabane, BT82 0DP | | Map & Directions |
| Thomas J Patterson | 028 8224 4567 | | 16 Gillygooly Road, Omagh, BT78 5PN | | Map & Directions |
| W J Scott & Son | 028 8676 2325 | | 57-59 James Street, Cookstown, BT80 8AE | | Map & Directions |
| J Bunting | 028 9060 0606 | | Blackstaff Road , Kennedy Way Industrial Estate , Belfast, BT11 9DT | | Map & Directions |
| Ni Gas Plumbing & Heating Ltd | 028 9334 1093 | | 16 Castlebrook Avenue, Ballynure, Ballyclare, BT39 9GX | | Map & Directions |
| Robert Hull | 028 3883 1600 | | 21 Gilford Road, Scarva, Craigavon, BT63 6NG | | Map & Directions |
| Stanley Mcclelland | 028 9146 5183 | | 68 Cotton Road, Bangor, BT19 7QH | | Map & Directions |
| James Gray | 028 9447 3662 | | 24 Hollybrook Road, Randalstown, Antrim, BT41 2PB | | Map & Directions |
| Hgs Building & Mechanical Services Ltd | 028 7964 2433 | | Victoria House, Main Street, Maghera, BT46 5AF | | Map & Directions |
| A Rankin & Son | 028 7946 8231 | | 60 Main Street, Castledawson, Magherafelt, BT45 8AB | | Map & Directions |
| D H Plumbing & Heating | 028 9086 0124 | | 25 Sycamore Drive, Newtownabbey, BT37 0PA | | Map & Directions |
| Burnison Plumbing & Heating | 028 9332 2016 | | 42 Ballygowan Road , Ballyclare, BT39 9UP | | Map & Directions |
| Willliam Telford & Son | 028 2565 3880 | | 99 Broughshane Street, Ballymena, BT43 6ED | | Map & Directions |
| B J Mckay | 028 9447 2678 | | 120 Magheralane Road , Randalstown, Antrim, BT41 2PD | | Map & Directions |
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