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boiler with white pipe system

Boiler Installations & Repairs – 24 Hour Service, Treharris

GavGas offers 24/7 boiler services. Quick response times  - Efficient installations.

Call now to discuss your project.

Professional Boiler Installations

Looking to replace an old boiler or install a completely new system? We provide a full range of boiler installation services using only trusted, energy-efficient brands. Whether you need a combi, system, or conventional boiler, we’ll help you choose a great solution for your property for reliable heating and long-term energy savings.

Quality Service

Fast Response

Fully-Qualified

heating engineer adjusts knobs on a white boiler

Comprehensive Installation Services

​Our boiler installation process covers every step from start to finish. This includes a free, no-obligation quote, supply and professional fitting of high-efficiency boilers, safe removal and disposal of your old unit, system testing, safety checks, and optional smart thermostat integration. All work is carried out by fully qualified Gas Safe registered engineers and comes with manufacturer warranties for peace of mind.

Fast And Reliable Boiler Repairs

No heating or hot water? Strange noises or pressure drops? Our team offers fast-response boiler repairs designed to get your system running efficiently again, often on the same day. We handle common issues such as leaking boilers, pilot light faults, low pressure, noisy pipes, and error codes. With a wide range of replacement parts available, most problems are resolved immediately, with transparent, upfront pricing and no hidden fees.

Why Choose Our Heating Experts

With over 25 years of experience, our fully qualified Gas Safe registered engineers deliver exceptional boiler installation and repair services. We combine competitive pricing with fast response times, emergency support, and trusted local knowledge. Our commitment to quality, safety, and customer satisfaction ensures that every home receives reliable, long-lasting heating solutions, along with friendly advice and ongoing aftercare. Contact us now for professional services.

Had a new combi boiler fitted, excellent customer service, polite and friendly, cleaned up as he went along. The boiler is working perfectly, highly recommend.

Call For A Replacement Boiler Or Repairs

Upgrade Or Repair Your Boiler With Fast, Reliable, And Energy-Efficient Solutions. Our Experienced Team Ensures Safe, Professional Boiler Installations And Repairs You Can Trust.

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