SFL Insta-Lock (IL) Gas Vent Flue Pipe - Straight Lengths
SFL Insta-Lock (IL) Gas Vent Flue Pipe - Straight Lengths

SFL Insta-Lock (IL) Gas Vent Flue Pipe - Straight Lengths

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SFL Insta-Lock (IL) Gas Vent Flue Pipe - Straight Length Chimney Flue Pipe

 About the IL gas vent twin wall system - 

 Lengths are available from 152mm (6") to 1523mm (60") and should be used in combination to make up the required height. Gas vent lengths should not be cut. Adjustable lengths are available to accommodate odd distances between vent lengths or connectors. To accommodate the required length these telescope over any standard length. The installed length of each unit is 38mm (1-1/2") less than the overall length.

All lengths and fittings are manufactured with the inner liner fabricated from aluminium. The outer casing is Zalutite. Vertical seams are rolled and securely locked. The inner and outer casings are joined at one end only and a 6mm (1/4") air gap is incorporated: the inner liner is therefore free to expand as the temperature changes in the flue. The various components are joined by a simple swaged locking joint and a lock tab if desired.


SFL Insta-Lock gas vent LOCKTAB feature 

The LOCKTAB feature was developed in response to customer feedback concerning the use of sheet metal screws to secure gas vent sections. In many areas, the use of sheet metal screws is either a commonly accepted practice or a local requirement. The use of 1/4" sheet metal screws is expensive and time-consuming for installers. The use of the LOCKTAB feature gives installers the option of engaging this tab instead of using sheet metal screws. 

  1. Assemble Insta-Lock sections as usual.
  2. The LOCKTAB is then depressed with a thumb or blunt object such as a screwdriver into the lock channel of the male end of the pipe.
  3. To disengage the LOCKTAB, pry it up by using a screwdriver or knife blade.