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GB125 Concentric Vent
Design Manual
GB125 Concentric Vent Design Manual | 05 .2009
Technical specifications are subject to change without prior notice
Union for UB Flex Pipes
Under certain circumstances it may be necessary to
connect 2 UB-Flex pipes. Use the following union:
Table 14
Part Number
Description
87094668
Union for 2 UB Flex pipes
Do not exceed the maximum vent length permitted based
on the size of the boiler (Table 2).
The union consists of a main body Fig. 25, item 5), 2 split
rings (item 3), 2 red gaskets (item 4), and 2 identical
screw top and bottom pieces (Item 2).
Only perforated sections of the UB Flex pipe can be
connected, and it is necessary to cut off any smooth
section. Make cuts perfectly perpendicular to the pipe.
Disassemble the union and observe the arrows on the
main body dictating the direction of the flue gas flow.
Slide the threaded ring with the threads facing to the
loose end over the UB flex pipe.
Slide the split ring over the corrugated UB flex pipe with
the flange facing the lose end, and snap into its second
grove.
Slide the red gasket over the UB flex pipe and snap into
its very first grove.
Now insert the pipe so prepared into the main body and
screw the threaded ring in until hand tight.
Repeat the same with the other end.
Fig. 24 UB flex pipe union
Fig. 25 UB flex pipe union breakdown
1 UB Flex pipe, cut off smooth section
2 Screw top and bottom (2)
3 Split ring (2x)
4 Red gasket (2x)
5 Center piece (arrow pointing in direction of flue gases)
