Quattro-Plus is a flexible flue liner which is designed for re-lining an existing masonry chimney that has failed or to increase the performance of the chimney. It can only be installed in a masonry chimney and has to be totally enclosed within it. A wood and plaster board, or similar, is not acceptable.
It is manufactured with two skins of either stainless steel and is suitable for gas, oil and multi-fuel, including wood burning appliances where the maximum flue gas temperature does not exceed 600°C.
There are two grades available 316L and 904L; 904L is a higher grade that is suitable for more extreme conditions found with coal based solid fuel installations.
Our multi-fuel flexible flue liners come with a manufacturer's lifetime* warranty.
*"Lifetime" refers to the lifetime of your appliance
Quattro-Plus is CE Approved to BSEN 1856:2, it is also a HETAS Approved product. It is also rated to 600°C
Its designation is EN1856-2 T600 W Vm L50012 G (316L only) and EN1856-2 T600 W Vm L70012 G (904L only)
Gas and Oil Liner Triplelock gas liner is a flexible flue liner which is designed for re-lining an existing masonry chimney that has failed or to increase the performance of the chimney. Manufactured from a single strip of 316L grade stainless steel and is suitable for gas and kerosene burning appliances and designed to accommodate flue gas temperature does not exceed 260°C.
Triplelock is CE Approved to BSEN 1856:2 and BS 715:1993. Its designation is EN1856-2 T250 N1 D V3 L50010 G
Screw-FIX Flexible Liner Fittings This is a range of products to be used with Quattro-Plus flexible flue liner. This product range helps to maintain the integretity of the liner, as all the products screw onto the liner, so the liner is not punctured by screws or bolts. It is also a gas-tight fit and it is impossible for the liner to get dislodged from the fitting. The lifetime warranty of Quattro-Plus is only valid when installed using the Screw-FIX range of ancillary products.
MI-Easy-Stove-Connect MI-Easy-Stove-Connector kit has been designed to enable the installer to retro-fit a stove appliance after the register plate has been installed, giving the flexibility of movement in the connecting flue pipe. If used in conjunction with the adjustable register plate it will make the installation very quick and easy.
Liner Insulation We recommend insulation or back filling only on tall, large or exposed chimneys. Whilst not essential, an insulated flue should ensure maximum performance and minimize condensation in the lining. Mi-Flues have a complete range of flue liner insulating products, Vermiculite, MI-Flexwrap, Rockwool Tubes and Thermaflue Liner Wrap.