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    Home < Gas Valves

    Gas Valves

    At National Boiler Spares, whether you’re replacing a worn valve or upgrading your system, our selection of high-quality gas valves guarantees reliability and optimal operation.

    Boiler gas valves are vital components in any heating system, controlling the flow of gas to ensure safe and efficient combustion. These valves work in harmony with other system parts to regulate gas supply, prevent over-firing, and maintain consistent heating performance.

    Worn or malfunctioning gas valves can cause significant issues and inefficiencies in your heating system. Common signs that a gas valve may need replacement include: 

    • Boiler not igniting or delayed ignition
    • Inconsistent or fluctuating heating performance
    • Unusual smells, such as gas odours
    • Boiler frequently locking out or shutting down 

    Promptly replacing faulty gas valves is crucial to ensure the safety, efficiency, and longevity of your boiler system.

    Buy gas valves online

    National Boiler Spares stock a wide range of boiler gas valves for many brands and manufacturers including Baxi, Worcester, Vaillant, Ideal, Glowworm and more.

    Shop our range now including the Worcester gas valve, Ideal mini boiler gas valve, and many more. Try using our search bar above to find your specific boiler gas valve by parts or GC number with ease.

    Why choose National Boiler Spares?

    Here at National Boiler Spares, we are a trusted source of high-quality boiler spare parts and heating components to customers throughout the UK and beyond. Our comprehensive range of new brand genuine parts covers the latest and older model boilers, all available at the best possible prices online or over our trade counter. We work closely with our suppliers to ensure that we always have the latest and most innovative products available, and we are constantly expanding our boiler spares and parts range to meet the evolving needs of the industry.

    Boiler gas valves – FAQs:

    What is a boiler gas valve, and how does it work?

    A gas valve controls the flow of gas into the burner of the boiler. It regulates how much gas is supplied for combustion based on the boiler’s heat demand.

    Boiler gas valves open and close in response to signals from the thermostat and boiler control system, allowing the boiler to heat water as needed. It also acts as a safety mechanism, shutting off the gas supply if any issues, like flame failure, are detected.

    Why do gas valves fail?

    Gas valves can fail due to: 

    • Wear and tear over time.
    • Electrical faults in the control wiring.
    • Corrosion from moisture or poor venting.
    • Debris or blockages in the valve mechanism.

    How can I test if the gas valve is working?

    Professional testing is recommended due to the risks involved with gas. However, a multimeter is typically used to check for power at the valve terminals. A gas technician can also test if the valve is opening and closing properly.

    How long do boiler gas valves usually last?

    Gas valves typically last 10 to 15 years, but their lifespan can vary based on factors such as usage, maintenance, and the quality of the gas supply. Regular inspections and proper care can help ensure they operate effectively for as long as possible.Â