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Trusted Plumbing & Heating Services in Trowbridge
G4 Gas is a trusted plumbing and heating service provider based in Trowbridge, serving clients across Wiltshire and surrounding areas. With over 25 years of combined experience, our Gas Safe registered engineers specialise in boiler servicing, central heating installations, and emergency plumbing solutions. We prioritise safety, efficiency, and customer satisfaction, offering tailored services for gas, oil, and LPG systems. Our commitment to quality is reflected in our FSB membership, SMART thermostat installations, and a reputation for reliable, transparent service.

We provide free site visits, no call-out fees, and competitive pricing, ensuring peace of mind for homeowners and landlords alike. Our teams expertise extends to renewable technologies like air source heat pumps and solar thermal systems, positioning us as a forward-thinking partner for all heating and plumbing needs.
Services
Gas Boiler Servicing Oil Boiler Servicing LPG Boiler Servicing Boiler Replacement Plumbing Services Central Heating Repairs Air Source Heat Pumps Solar Thermal Flushing Water Softeners Emergency Plumbing
Highlights and features
  • Gas Safe registered engineers for safe, compliant work
  • Over 25 years of combined experience in heating and plumbing
  • SMART thermostat installations for energy-efficient control
  • Excellent local reputation with 5.0 stars from 66 reviews
  • Free site visits and no call-out fees for all services
Associations and certifications
  • Gas Safe Register
  • FSB (Federation of Small Businesses)
What people say
Prompt emergency service Professional and friendly Excellent value Reliable long-term Great communication
Services
Gas Boiler Servicing
Our Gas Safe engineers provide thorough annual servicing for gas boilers, ensuring safety, efficiency, and compliance. This includes checking for carbon monoxide leaks, cleaning components, and validating warranties. Regular servicing reduces breakdown risks and extends boiler lifespan while maintaining optimal performance for consistent home heating.
Emergency Plumbing
Available for urgent plumbing issues like burst pipes, leaks, and heating failures. Our rapid-response team resolves problems swiftly, minimising property damage and restoring functionality. Services include leak detection, pipe repairs, and emergency radiator fixes, ensuring minimal disruption to households and businesses.
Boiler Replacement
We supply and install high-efficiency gas, oil, and LPG boilers tailored to property needs. Our range includes modern condensing boilers and renewable options like biomass systems. Upgrades include SMART thermostat integration for remote temperature control, enhancing energy efficiency and reducing long-term heating costs.
Central Heating Repairs
Comprehensive repairs and upgrades for central heating systems, including radiator fixes, pump replacements, and thermostat installations. We address issues like cold spots, leaks, and pressure problems, ensuring even heat distribution and improved system reliability across residential and commercial properties.
Water Softener Installation
We install Harvey Water Softeners to combat limescale in hard water areas like Wiltshire. These systems remove calcium and magnesium ions, preventing scale buildup in pipes and appliances. Benefits include softer skin, cleaner fixtures, and extended appliance lifespan, with low-maintenance, non-electric operation.
Questions
Do you offer emergency call-outs?
Yes, we provide 24/7 emergency plumbing and heating services with rapid response times for urgent issues like leaks or boiler breakdowns.
How often should I service my boiler?
Annual servicing is recommended for gas, oil, and LPG boilers to ensure safety, efficiency, and warranty validity, ideally before winter.
Can you install SMART thermostats?
Yes, we integrate SMART thermostats with boilers and heat pumps, enabling remote temperature control via smartphone apps for improved efficiency.
Do you cover areas outside Trowbridge?
We serve Wiltshire and surrounding regions including Bath, Chippenham, Frome, and Devizes, with free site visits across our service area.
Are financing options available?
Yes, we offer financing solutions for boiler replacements and major installations, making upgrades more accessible with flexible payment plans.