24
Design, Installation & Assembly
Frequently Asked Questions
WHAT BASIC COMPONENTS ARE REQUIRED FOR A TYPICAL RELINING SYSTEM?
A typical installation would include the liner, a clamp plate and terminal. These are generally
supplied in a kit form for Triplelock Flex, a debris plate would also be required to seal off the
base of the stack. In the case of an open fire using TecnoFlex Plus, a gather unit, and debris plate
would be necessary together with a top insert and a suitable terminal/pot. When installing a flue
liner for use on a gas fire complying to BS7977-1, BS7977-2 and BS EN 509 (i.e. Radiant, BBU,
DGF or ILFE), a range of flueboxes are available with Triplelock Flex and TecnoFlex Plus spigots
for use within the chimney opening.
WHEN A ROOF HAS BEEN CONVERTED FROM FLAT TO PITCHED, AND THE
EXISTING CHIMNEY IS CAPPED, CAN THE CHIMNEY BE REUSED TO ACCOMMODATE
A NEW APPLIANCE?
The chimney can be reused providing the existing brickwork is inspected to ensure it is in good
condition. The chimney can be lined with the appropriate liner, ensuring that the liner is used
only inside the stack. Extension from the top of the capped off stack should be made using a
System Chimney approved to BS EN1856-1, such as Eco ICID or ICS. Connection from the
appliance should be made using a connecting flue pipe approved to EN1856-2 such as Prima
Plus for all fuels, or Prima Smooth in the case of solid fuel.
IS THE FLEXIBLE LINER PULLED UP OR DOWN THE CHIMNEY, AND WHAT SHOULD
BE USED?
The flue liner can be pulled up or down the chimney the chimney using a nose cone and string/
rope. A nose cone can be purchased, rope attached, and connected to the end of the liner.
THE EXISTING CHIMNEY HAS A FLEXIBLE FLUE LINER FITTED, CONNECTED TO AN
OLD GAS FIRE. IF THE FIRE WAS TO BE CHANGED CAN THE LINER BE REUSED FOR
THE NEW FIRE?
Yes, in general terms, providing the diameter and type of flex is suitable for the new appliance
to be fitted, the installer has inspected the liner and is satisfied that the condition of the liner
is such that it may be reused with the new appliance. However, as the lifespan of the previous
appliance and liner may not be known, it is
strongly
recommended the old flueliner is removed,
the chimney swept, then a suitable new liner installed.
ARE THERE ANY OTHER MAINTENANCE CHECKS THAT SHOULD BE CARRIED OUT
WHEN INSTALLING A NEW APPLIANCE?
It will be necessary to check that the flaunching at the top of the stack is not cracked, and if
Appliance
Chimneys built before 1.2.1966
Chimneys built after 1.2.1966
Gas Fire
Input up to 10kW
Triplelock can be used in unlined
chimney
Triplelock can be used in lined
chimney
Gas Fire
Output up to 10kW
TecnoFlex Plus can be used in
unlined chimney.
TecnoFlex Plus can be used in
lined chimney.
