Business Details
9 Years
experience
Emergency
services
Your Trusted Plumbing & Heating Specialists in Brecon
Established in 2017 by Martin and Samantha Mainwaring, Mains Gas is a family-run business specialising in heating and plumbing services across Brecon and surrounding areas. Our Gas Safe and OFTEC-accredited team delivers reliable solutions for domestic and commercial properties, including boiler installations, central heating, emergency repairs, and powerflushing. With a commitment to quality and customer satisfaction, we offer 24/7 emergency services, 12-year guarantees on selected boilers, and flexible financing options. Recognised as Wales' top heating and plumbing engineers for three consecutive years, we prioritise safety, efficiency, and professionalism in every project. 
Services
Boiler Installations
Central Heating
Gas Fires
Heat Pumps
Plumbing Services
Commercial Heating
Landlord Safety Checks
Powerflushing
Underfloor Heating
Bathroom Installation
Details
- Year established: 2017
Highlights and features
- We offer 24/7 emergency plumbing and heating repairs.
- Our engineers are Gas Safe and OFTEC accredited.
- We provide 12-year guarantees on selected Worcester Bosch boilers.
- Flexible 0% interest financing options for boiler installations.
- Award-winning service with three consecutive wins for Wales' best plumbers.
Associations and certifications
- Gas Safe
- OFTEC
What people say
24/7 emergency support
12-year guarantees
Expert engineers
Prompt service
Professional team
Services
Boiler Installations
We install energy-efficient boilers for domestic and commercial properties. Our Worcester Accredited Partnerships ensure up to 12-year guarantees. Engineers provide free no-obligation quotes and handle installations with minimal disruption, adhering to Gas Safe standards.
Central Heating
Our central heating solutions include system design, installation, and maintenance. We address efficiency issues through powerflushing and smart controls. Services cover gas, oil, and air source heat pump systems for residential and commercial clients.
Emergency Repairs
Available 365 days a year, our Gas Safe engineers resolve urgent plumbing and heating issues. We prioritise rapid response times for boiler breakdowns, leaks, and gas safety concerns, ensuring minimal downtime for domestic and commercial clients.
Powerflushing
This service removes sludge and debris from central heating systems. We use advanced techniques to restore efficiency, prevent cold radiators, and extend system lifespan. Recommended for systems showing reduced performance or noise.
Commercial Heating
We provide boiler installations and maintenance for industrial, retail, and public sector properties. Our Gas Safe-certified team conducts free surveys, offers tailored solutions, and ensures compliance with safety standards during business operations.
People
Martin Mainwaring
Company Director & Commercial Engineer
Martin co-founded Mains Gas in 2017 with over 20 years' experience in heating engineering. He oversees commercial operations, ensuring high standards and compliance with Gas Safe regulations.
Samantha Mainwaring
Director / Office Manager
Samantha co-founded Mains Gas, managing office operations and client communications. Her organisational expertise ensures smooth project coordination and customer satisfaction across domestic and commercial services.
Tristan
Engineer
Tristan is a qualified heating engineer specialising in boiler installations and emergency repairs. He adheres to Gas Safe standards, providing reliable solutions for domestic and commercial clients in South Wales.
Nathan
Engineer
Nathan delivers expert plumbing and heating services, focusing on system maintenance and powerflushing. His OFTEC certification ensures compliance with safety standards for residential and commercial properties.
Damian
Engineer
Damian specialises in commercial heating systems, conducting surveys and installations for industrial clients. His Gas Safe accreditation guarantees safe, efficient solutions tailored to business requirements.
Questions
Do you offer emergency plumbing services?
Yes, we provide 24/7 emergency repairs for plumbing and heating issues, including weekends and bank holidays.
Can I spread the cost of a new boiler?
Yes, we offer 0% interest finance options with deposits from £625 and monthly payments over 2–10 years.
Are your engineers certified?
All engineers are Gas Safe and OFTEC accredited, with valid identification cards available upon request.
What areas do you cover?
We serve Brecon, Abergavenny, Herefordshire, Swansea, and surrounding areas in South Wales and England.
Do you provide commercial heating solutions?
Yes, we offer boiler installations, maintenance, and emergency repairs for industrial, retail, and public sector properties.
What guarantees do you offer?
Selected Worcester Bosch boilers come with up to 12-year manufacturer guarantees, subject to terms and conditions.
