- Gasplec
- 01273 708995 - 55 Coleridge Street, Hove, East Sussex, BN3 5AB
- Gastec
- 01323 766799 - 10 St. Johns Drive, Westham, Pevensey, East Sussex, BN24 5HU
- Multi Gas Installations
- 01323 892588 - 39 Blatchington Hl, Seaford, East Sussex, BN25 2AL
- Regency Gas Fires
- 01273 582800 - 36a South Coast Road, Peacehaven, East Sussex, BN10 8SU
- C-Gas
- 01580 765671 - Nassim Cott Grange Rd, St. Michaels, Tenterden, Kent, TN30 6DX
- Servomex
- 01892 652181 - Rotherfield Rd, Crowborough, East Sussex, TN6 3JZ
- M J Heating and Plumbing
- 07850 431809 - 15 Sandgate Close, Seaford
- Hastings Plumbing & Heating Centre
- 01424 425682 - 88 Stonefield Road, Hastings, East Sussex, TN34 1QA
- K.B Calibration Services
- 01424 438819 - 1 Theaklen Drive, St Leonards-on-Sea, East Sussex, TN38 9AZ
- H.T Products
- 01323 442035 - Lower Dicker, Hailsham, East Sussex, BN27 4BW
- J. A. B. Ltd
- 01273 263676 - 39 Brownleaf Road, Brighton, BN2 6LD
- Gas Tech Services
- 07000 222666 - Roundwood North Trade Road, Sussex
- P. Moorton Plumbing and Heating
- 0845 0135238 - Eastbourne
- Ark Services Plumbing and Heating
- 0845 0137164 - Eastbourne
- Ark Services Plumbing and Heating
- 07939 433326 - 13 Wildwood, Eastbourne, BN23 8NZ
- IB Heating
- 0845 4916785 - Tenterden
- IB Heating
- 0845 4916809 - Tenterden
- John Upward Heating Services
- 0845 2915739 - 5 Orchard Close, Shoreham By Sea, West Sussex, BN43 5UT