Grand Bay 40 Direct Vent Freestanding
Page 26
January 2000
VERTICAL TERMINATIONS (cont.)
USING GS SERIES PIPE (cont.)
Step 4.
Assemble the desired lengths of black pipe and elbows necessary to reach from the stove
up through the round support box. Insure that all pipe and elbow connections are in their
fully twist-locked position. Be sure to seal the pipe with appropriate sealant.
Step 5.
Cut a hole in the roof centered on the small drill hole placed in the roof in step 2. The hole
should be of sufficient size to meet the minimum requirements for clearance to
combustibles, as specified. Continue to assemble lengths of pipe and elbows necessary to
reach from the ceiling support box up through the roof line. Galvanized pipe and elbows
may be utilized in the attic, as well as above the roofline. The galvanized finish is desirable
above the roofline, due to its higher corrosion resistance.
NOTE:
(1)
If an offset is necessary in the attic to avoid obstructions, it is important to support the
vent pipe every 3 (914mm) to avoid excessive stress on the elbows, and possible separation.
Wall straps are available for this purpose (Figure 12).
(2)
Whenever possible, use 45° elbows, instead of 90° elbows. The 45° elbow offers less
restriction to the flow of flue gases and intake air.
Step 6.
Slip the flashing over the pipe section(s) protruding through the roof. Secure the base of
the flashing to the roof with roofing nails. Insure the roofing material overlaps the top
edge of the flashing to the roof with roofing nails. Insure the roofing material overlaps the
top edge of the flashing as shown in Figure 14. Verify that you have at least the minimum
clearance to combustibles at the roofline.
FIG. 14
VENTING:
VER
TICAL
TERMINA
TIONS
