| Conaty Mechanical | 07763 942051 | | 3 John Street, Crossgar, BT30 9EG |  Map & Directions |
| Allen & Graham | 028 9024 5452 | | 37 Pandora Street, Belfast, BT12 5PR | | Map & Directions |
| Kearns Mechanical Services | 028 6773 8800 | | Hillview House, Aughanhinch, Newtownbutler, Enniskillen, BT92 0GY | | Map & Directions |
| C H C Facilities Management Ltd | 028 3833 4874 | | Unit 33, Seagoe Industrial Area, Portadown, Craigavon, BT63 5QD | | Map & Directions |
| F M Services | 028 9064 2228 | | 12 Mount Merrion Gardens, Belfast, BT6 0FW | | Map & Directions |
| Evans Brothers | 028 9041 0354 | | 4 Cumberland Court, Dundonald, Belfast, BT16 2AP | | Map & Directions |
| Mcaleer & Mcgarrity Ltd | 028 8675 1905 | | 79 Tulnacross Road, Cookstown, BT80 9NP | | Map & Directions |
| Edmund Donaldson | 028 4176 3227 | | 56 Newry Road, Kilkeel, Newry, BT34 4ES | | Map & Directions |
| P & E Services | 028 9083 7564 | | 111 Church Road , Newtownabbey, BT36 6HG | | Map & Directions |
| James Mcilroy | 028 9335 1851 | | 82 Paisleys Road, Carrickfergus, BT38 9AH | | Map & Directions |
| Cooney Bros | 028 9030 1885 | | 219 Finaghy Road North, Belfast, BT11 9ED | | Map & Directions |
| K P Mclaughlin | 028 7776 5476 | | 25 New Line Road, Limavady, BT49 9NF | | Map & Directions |
| H Allen | 028 3835 9313 | | 181 West Street , Portadown, Craigavon, BT62 4BT | | Map & Directions |
| David Scott & Son | 028 9081 2331 | | 70 Ballynahinch Road, Carryduff, Belfast, BT8 8DP | | Map & Directions |
| Sean Mccaugherty | 028 9756 5455 | | 35 Cumber Road, Drumaness, Ballynahinch, BT24 8SG | | Map & Directions |
| Sapphire Solutions | 028 9060 3810 | | 20 Trenchard, Belfast, BT11 9NS | | Map & Directions |
| Curran | 028 6772 4402 | | Unit 2, Drumbrughas North, Lisnaskea, Enniskillen, BT92 0PE | | Map & Directions |
| Armstrong Plumbing | 028 9267 6875 | | 113 Saintfield Road, Lisburn, BT27 5PA | | Map & Directions |
| Serviceheat | 028 9146 3517 | | Unit 36, Enterprise House, 2-4 Balloo Avenue , Bangor, BT19 7QT | | Map & Directions |
| A Rankin & Son | 028 7946 8231 | | 60 Main Street, Castledawson, Magherafelt, BT45 8AB | | Map & Directions |
| E Doherty | 028 7126 5436 | | 7 West End Terrace, Londonderry, BT48 9EW | | Map & Directions |
| J B R Services | 028 3883 2258 | | 18 Park Lane, Gilford, Craigavon, BT63 6BE | | Map & Directions |
| Thomas J Patterson | 028 8224 4567 | | 16 Gillygooly Road, Omagh, BT78 5PN | | Map & Directions |
| Freeflow Plumbing Services | 028 9447 2387 | | 53 Derryhollagh Road, Randalstown, Antrim, BT41 3HP | | Map & Directions |
| D H Plumbing & Heating | 028 9086 0124 | | 25 Sycamore Drive, Newtownabbey, BT37 0PA | | Map & Directions |
| Pipeline Services | 028 9037 0662 | | Unit 22, Dargan Crescent, Somerton Industrial Park, Belfast, BT3 9JB | | Map & Directions |
| J Hinds | 028 4277 1652 | | 15 Dunevly Road, Portaferry, Newtownards, BT22 1NB | | Map & Directions |
| Allen Mechanical Services | 028 9269 9606 | | 37 Villa Wood Road , Dromore, BT25 1LG | | Map & Directions |
| Coast Line Mechanical Services | 028 7775 0322 | | 16 Limestone Road, Limavady, BT49 0LB | | Map & Directions |
| Mid Ulster Heating Services- | 07860 422071 | | 40 Castletown Road, Aughnacloy, BT69 6ED | | Map & Directions |
| S M Sandford | 028 9186 1042 | | 238 Ballywalter Road, Millisle, Newtownards, BT22 2LY | | Map & Directions |
| Mccollam Ltd | 028 9443 2734 | | 7 Lylehill Road, Templepatrick, Ballyclare, BT39 0EN | | Map & Directions |
| Bernard J Mulholland | 028 3833 2620 | | 3 Killycomain Road , Portadown, Craigavon, BT63 5BT | | Map & Directions |
| James Davey | 028 9023 5919 | | Unit 21, Westlink Enterprise Centre, 30-50 Distillery Street , Belfast, BT12 5BJ | | Map & Directions |
| Lear Mechanical Services | 028 7778 1700 | | 184 Learmount Road, Park, Londonderry, BT47 4BA | | Map & Directions |
| Adrian Magorrian | 028 4372 4688 | | 17 Ardaluin Court, Newcastle, BT33 0RT | | Map & Directions |
| R J M Heating & Plumbing Services Ltd | 028 9146 6461 | | 11 Westmorland Crescent, Bangor, BT20 3LX | | Map & Directions |
| Philip Hughes | 028 4277 2160 | | 12c Ballygalget Road, Portaferry, Newtownards, BT22 1NE | | Map & Directions |
| T J Mcconnell & Sons | 028 7136 9161 | | 32 Balliniska Road, Londonderry, BT48 0NA | | Map & Directions |
| Smyth & Walker | 028 9335 1837 | | 2 Hillview Avenue , Carrickfergus, BT38 8YP | | Map & Directions |
| Maurice Stevenson Ltd | 028 3832 7636 | | Annesborough Industrial Estate, Site 32 Annesborough Road, Lurgan, Craigavon, BT67 9JD | | Map & Directions |
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