Instructions / Assembly

ECCO Manufacturing™ www.eccomfg.com 5
Rev. 1
Table of 45° Offsets (for attic area where required)
Use this table to determine the maximum offset produced by two 45° elbows and one
length of vent pipe.
NOTE: Maximum Offsets for 4", 5", and 6" elbows are at 60˚
Offset
Vent Size
Length Used
None 6" 12" 18" 24" 36" 48" 60"
3 3-1/2 6-5/8 10-7/8 15-1/8 19-3/8 27-3/4 36-1/4 44-3/4
4 6-1/4 10 15-1/4 20-3/8 25-5/8 36 46-3/8 56-3/4
5 6-3/4 10-1/2 15-3/4 20-7/8 26-1/8 36-1/2 46-7/8 57-1/4
6 7-3/8 11-1/8 16-3/8 21-1/2 26-3/4 37-1/8 47-1/2 57-7/8
7 5 8-1/8 12-3/8 16-5/8 20-7/8 29-1/4 37-3/4 46-1/4
8 5-1/2 8-5/8 12-7/8 17-1/8 21-3/8 29-3/4 38-1/4 46-3/4
Vertical Rise
Vent Size
Length Used
None 6" 12" 18" 24" 36" 48" 60"
3 8-3/8 11-1/2 15-3/4 20 24-1/4 32-5/8 41-1/8 49-5/8
4 10-3/4 13 16 19 22 28 34 40
5 11-3/4 14 17 20 23 29 35 41
6 12-1/2 14-3/4 17-3/4 20-3/4 23-3/4 29-3/4 35-3/4 41-3/4
7 11-7/8 15 19-1/4 23-1/2 27-3/4 36-1/8 44-5/8 53-1/8
8 12-5/8 15-3/4 20 24-1/4 28-1/2 36-7/8 45-3/8 53-7/8
Installation with White Metal Products Inc. and
Metal-Fab Oval B-Vent (USA only)
• When connecting ECCO Round B-Vent to White Metal
Products/Metal Fab Oval B-Vent (as shown in Figure 2A and
2B), assemble the components together and secure with
(2) #8 × 1/4" sheet metal screws.
• Care must be taken not to pierce or damage the inner flue
gas conduit. Check the connection to ensure that the inner
conduit is not damaged and that the joint is gas tight and
safe for use.
• ECCO cannot assume any responsibility for any changes in
other manufacturers’ B-Vent products that may impede the
safe connection with ECCO B-Vent products .
• ECCO B-Vent is UL listed for use with White Metal Products Inc.
Twinstack, and Metal-Fab Oval Type B Gas Vent. (USA Only).
WHITE METAL PRODUCTS
METAL-FAB OVAL B-VENT
Figure 2BFigure 2A