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Triplelock - Adaptor to Single Wall - Ø 300 (34-300-A)

The Triplelock Adaptor to Single Wall – Ø 300 by National Flues is a premium gas flue solution designed for secure and efficient installations. As an industry leader in UK flue systems, National Flues offers this high-quality adaptor that not only meets BS 715:1993 standards but also provides unparalleled durability and weather resistance. Ideal for gas-fired installations, this adaptor ensures your chimney is professionally equipped to handle safety and performance demands, making it a top choi Read more...
Triplelock - Adaptor to Single Wall - Ø 300
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At a Glance

    Designed specifically for gas flue applications with a GC1 gas terminal requirement
    Constructed from durable 316L material (0.10mm thick) for long-lasting performance
    Provides a secure, weather-resistant seal when installed with acid-resistant cement
    Engineered for precision fit over protruding liners in single wall flue systems
    Complies with BS 715:1993 standards ensuring quality and safety

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Have Questions?
Phone: 01670 206999
Email: [email protected]

The Triplelock Adaptor to Single Wall - ø 300 is an essential component for those installing or retrofitting gas flue systems. This adaptor serves as a secure termination point where a gas terminal (GC1) is required for gas-fired appliances. Engineered for precision and durability, the adaptor fits over a protruding liner and can be secured using a stainless steel screw, ensuring a firm and weather-resistant seal.

During installation, we recommend using an acid-resistant cement to enhance the seal and provide extra protection against the elements. For optimal performance and safety, it's crucial to maintain your chimney by sweeping it annually or more frequently if needed, particularly when serving gas and oil appliances.

SKU: 34-300-A

Technical Specifications
SKU34-300-A
DesignationEN1856-2 T260 N1 D V3 L50010 G
Warranty2 Years
Material316L - 0.10mm thick
FuelsGas, 28 sec. oil
ApprovalsBS 715:1993
ManufacturerMi-Flues Ltd
ManufactureTriplelock
Flue Diameter300mm (12 inches)
For optimal performance, first ensure the chimney is clean and free of debris. Position the adaptor over the protruding liner at the apex of your chimney. Secure it firmly using a stainless steel screw, then apply a generous layer of acid-resistant cement around the joint to create a weather-proof seal. It is vital that the sealant fully encases the connection to protect against moisture and external elements. We recommend scheduling an annual inspection and sweep of your chimney, especially if the system serves gas or oil appliances, to maintain its efficiency and safety.

This adaptor is specifically designed for gas-fired appliances requiring a GC1 gas terminal for termination.

Place the adaptor over the protruding liner, secure it with a stainless steel screw, and use acid-resistant cement to seal and weather-proof the connection.

Yes, when installed correctly with suitable cement, the adaptor provides a durable weather-resistant seal.

Chimneys serving gas and oil appliances should be swept and maintained at least once a year or more frequently if necessary.

The Triplelock Adaptor is specifically designed for gas-fired flues and may not be suitable for other types of flue systems.

A standard screwdriver for the stainless steel screw and tools for applying cement are typically required.

This adaptor is designed for a flue with a diameter of 300mm (12 inches).
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Thursday, May 22nd. Delivery times of products not in our warehouses depend on product availability and shipping. If you need a definitive delivery time give us a call. If you need faster stove or fireplace delivery please also give us a call. We can sometimes reduce longer lead times if we pay the carrier £25 for express delivery. Visit our Shipping Information page for more information.

Warranty & Returns +

All our products come with warranties. Mi-Flex offers a lifetime guarantee. Returns for damaged items are covered by insurance; non-damaged returns incur return delivery costs.

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We will match any price like for like on a retail basis. Give us a call if you find it cheaper and want to buy from us.

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Triplelock - Adaptor to Single Wall - Ø 300

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