| A Roberts Plumbing and Heating Ltd | 2024 | 31 Aug 2027 (in 322 days) |
| A to B Plumbing, Heating & Tiling Ltd | 2022 | 31 Dec 2026 (in 79 days) |
| Alpine Gas Engineers Limited | 2015 | 31 Oct 2026 (in 18 days) |
| Andrew Dexter Plumbing & Heating Limited | 2014 | |
| Arwel Jones Plumbing & Heating Limited | 2011 | 31 Dec 2026 (in 79 days) |
| B H Heating Services Limited | 2022 | 31 Dec 2026 (in 79 days) |
| BBHS Installations Limited | 2018 | 31 May 2027 (in 230 days) |
| D Nixon Plumbing Services Limited | 2014 | 30 Sep 2027 (in 352 days) |
| D&P Air Conditioning Ltd | 2023 | 30 Sep 2027 (in 352 days) |
| D.Millington Plumbing and Heating Ltd | 2019 | 31 Jul 2027 (in 291 days) |
| Deeside Plumbing & Heating Services Limited | 2007 | 30 Apr 2027 (in 199 days) |
| DMR Plumbing & Heating Limited | 2017 | 31 Dec 2026 (in 79 days) |
| Dolwen Plumbing & Heating Ltd | 2025 | 21 Nov 2026 (in 39 days) |
| Ee Plumbing Heating & Renewable Energy Ltd | 2023 | 31 Jan 2027 (in 110 days) |
| Elite Heat Network Solutions Limited | 2022 | 31 May 2027 (in 230 days) |
| G Larby & Son Ltd | 2012 | 30 Sep 2027 (in 352 days) |
| Garry Walker Gas and Heating Services Limited | 2011 | 31 Jan 2027 (in 110 days) |
| Gerallt Davies Plumbing and Heating Services Limited | 2015 | 31 Aug 2027 (in 322 days) |
| Green Scene Group Ltd | 2012 | 30 Jun 2027 (in 260 days) |
| Griffiths Bros (WXM) Limited | 2002 | 31 May 2027 (in 230 days) |
| GRL Gas Limited | 2022 | 31 May 2027 (in 230 days) |
| Hallam Heating Limited | 2015 | 31 Dec 2026 (in 79 days) |
| Handyplumb Limited | 2014 | 30 Nov 2026 (in 48 days) |
| Heat Service (Wrexham) Ltd | 2019 | 31 Mar 2027 (in 169 days) |
| Heatkey Installations Ltd | 2013 | 31 Dec 2026 (in 79 days) |
| Iain Smith Plumbing and Heating Limited | 2026 | 14 Jun 2028 (in 610 days) |
| J M Roberts Plumbing & Heating Ltd | 2016 | 31 Mar 2027 (in 169 days) |
| Ja Plumbing & Heating (NW) Limited | 2025 | 2 Jul 2027 (in 262 days) |
| Jones Plumbing and Heating Limited | 2024 | 31 Jul 2027 (in 291 days) |
| Kayes Heating Services Ltd | 2026 | 8 Mar 2028 (in 512 days) |
| Lee Wright Plumbing & Heating Limited | 2017 | 31 Dec 2026 (in 79 days) |
| Lwe Plumbing & Heating Limited | 2024 | 31 Mar 2028 (in 535 days) |
| Lyndon J Ellams Limited | 2011 | 31 Dec 2026 (in 79 days) |
| Mark Jones Plumbing & Heating (NW) Ltd | 2017 | 28 Feb 2027 (in 138 days) |
| Mpe Air Conditioning Limited | 2024 | 30 Jun 2027 (in 260 days) |
| Nathan Peate Plumbing & Heating Limited | 2023 | 31 Oct 2026 (in 18 days) |
| NMH Plumbing & Heating Services Limited | 2008 | 31 Dec 2026 (in 79 days) |
| Noble Gas Ltd | 2020 | 31 Mar 2027 (in 169 days) |
| P M Norman Limited | 2003 | 30 Apr 2027 (in 199 days) |
| Platinum Gas Ltd | 2018 | 31 Jan 2027 (in 110 days) |
| Prime Plumbing & Heating North West Ltd | 2023 | 31 Aug 2027 (in 322 days) |
| Pro Gas WXM Ltd | 2018 | 30 Sep 2027 (in 352 days) |
| Pro Plumb (WXM) Ltd | 2015 | 31 Dec 2027 (in 444 days) |
| Proheat Heating Limited | 2018 | 31 Dec 2026 (in 79 days) |
| Re-Heat Solutions Ltd | 2022 | 31 Dec 2026 (in 79 days) |
| S W Heating Services Limited | 2007 | 31 Dec 2026 (in 79 days) |
| S. Fagan Gas Services Ltd | 2010 | 31 Dec 2027 (in 444 days) |
| S. L. Plumbing Limited | 2008 | 31 Dec 2026 (in 79 days) |
| Site Solutions Engineering Ltd | 2011 | 28 Feb 2027 (in 138 days) |
| ST Bathrooms and Heating Limited | 2026 | 8 Feb 2028 (in 483 days) |