| Albert Rowlands & Sons | 01248 853533 | | 56 Lon Conwy, Benllech, Tyn Y Gongl, LL74 8RP |  Map & Directions |
| Abal Plumbing & Heating | 01248 372900 | | 11 Ffordd Islwyn, Bangor, LL57 1AR | | Map & Directions |
| T G Dyson & Sons | 01745 350653 | | Foryd Road, Kinmel Bay, Rhyl, LL18 5BA | | Map & Directions |
| Benllech Plumbing | 01248 853066 | | Aelybryn, Benllech, Tyn Y Gongl, LL74 8SN | | Map & Directions |
| Kenneth Nolan | 01286 870741 | | Tyn Pwll, Penisarwaun, Caernarfon, LL55 3DB | | Map & Directions |
| Oakmere Plumbing | 01286 674610 | | 9 St. Helens Road , Caernarfon, LL55 2YD | | Map & Directions |
| Jones E J | 01758 613220 | | Crossing House, Abererch Road, Pwllheli, LL53 5YU | | Map & Directions |
| Rae Davis | 01492 623872 | | Cartref Lon Mynydd, Fernbrook Road, Penmaenmawr, LL34 6DE | | Map & Directions |
| Arwel Scourfield | 01978 780079 | | 28 Abbots Way, Bangor Isycoed, Wrexham, LL13 0AA | | Map & Directions |
| Alexander Plumbing | 01654 712133 | | 21 Idris Villas, Tywyn, LL36 9AW | | Map & Directions |
| Profile Services | 01248 670450 | | Glan Y Coed, Y Felinheli, LL56 4JR | | Map & Directions |
| William T Roberts & Son | 01248 353843 | | 59 Ffriddoedd Road, Bangor, LL57 2TT | | Map & Directions |
| J G Pritchard | 01978 840467 | | Grango Park, North Road, Ponciau, Wrexham, LL14 1HF | | Map & Directions |
| W R Owen | 01758 720782 | | Bryn Hyfryd, Lon Llan, Edern, Pwllheli, LL53 6JA | | Map & Directions |
| Alan Dodd | 01691 778149 | | Dee Vale, Cwmalis Road , Froncysyllte, Llangollen, LL20 7RR | | Map & Directions |
| Andrew Roberts Ltd | 01286 880132 | | 27 Rhedyw Road, Llanllyfni, Caernarfon, LL54 6SN | | Map & Directions |
| P C Butcher | 01407 741795 | | The Rectory, Llanfachraeth, Holyhead, LL65 4YA | | Map & Directions |
| A J Thomas Assocites Uk Ltd | 01492 573474 | | 83 Bryniau Road, Llandudno, LL30 2DZ | | Map & Directions |
| Rons Plumbing & Heating | 01492 517750 | | 11 Wynn Drive , Old Colwyn, Colwyn Bay, LL29 9DE | | Map & Directions |
| D D Corbett | 01978 757435 | | Sunnyside, Celyn Place, Coedpoeth, Wrexham, LL11 3ND | | Map & Directions |
| Mark Wilson Williams | 01978 750354 | | Swn-y-Gwynt, Cross Lane , Pentre Broughton, Wrexham, LL11 6AR | | Map & Directions |
| Griffiths E & Son | 01766 512822 | | 37 Dublin Street, Tremadog, Porthmadog, LL49 9RH | | Map & Directions |
| E Hughes & Son | 01758 720378 | | Ben Nevis, Lon Penrhos, Morfa Nefyn, Pwllheli, LL53 6BL | | Map & Directions |
| E Williams | 01248 723065 | | Glas Ynys, Bridge Street, Llangefni, LL77 7HH | | Map & Directions |
| C P S Services | 01824 710669 | | Derwen Fawr, Bontuchel, Ruthin, LL15 2DG | | Map & Directions |
| Barretts Heating & Plumbing | 01286 830858 | | Tryfan Uchaf, Rhostryfan, Caernarfon, LL54 7NL | | Map & Directions |
| Jones & Carter | 01745 332752 | | Redwood, Glandwr Crescent, Kinmel Bay, Rhyl, LL18 5HQ | | Map & Directions |
| E & F Griffith | 01758 770351 | | Cwr Coed, Tudweiliog, Pwllheli, LL53 8NA | | Map & Directions |
| John Davies | 01248 600646 | | Fron Olau, Hen Durnpike, Tregarth, Bangor, LL57 4NN | | Map & Directions |
| Edward Wynne Jones | 01766 770698 | | Sibrwd Yr Awel, Penrhyndeudraeth, LL48 6AY | | Map & Directions |
| A Jones | 01978 291818 | | Old Hall Cottage, Woodhouse Lane , Marchwiel, Wrexham, LL13 0ST | | Map & Directions |
| Anglesey Heating & Plumbing Services Ltd | 01248 722116 | | 8 Brig y Nant, Llangefni, LL77 7QD | | Map & Directions |
| M R Pritchard | 01745 355801 | | 2 Trem Cinmel, Towyn, Abergele, LL22 9NJ | | Map & Directions |
| Criccieth Plumbing & Heating | 01766 522737 | | 50 High Street, Criccieth, LL52 0EY | | Map & Directions |
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