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6"(15.2 cm) r ound meta[ vent
6"(15.2 cm) transition
6"(15.2 cm)
, round metal vent
/
\
round PVC
x,
sewer pipe
6" (15.2 cm)
max.
6" (t5.2 cm)
round 90° PVC
Tightly pack gravel or sand
round 90°
sewer pipe elbow
completely around pipe.
PVC sewer
pipe elbow
optional vent arrangement under
concrete sJab
12" (30.5 cm)
6" (15.2 cm) round transition
minimum
PVC sewer pipe
/
/
/6"
(t5.2 cm)
/
round metal vent
walJ
6" (t5.2 cm) round
cap
PVC coupling
(15.2 cm)
mira
42"
(10&7 cm)
max,
6" (t5.2 cm) round
PVC coupling
6" (15.2 cm)
round sewer pipe
6" (15.2 cm) round
90° PVC sewer
pipe eJbow
Tightly pack grave[ or sand
completely around pipe.
optiona[ vent arrangement through
window well under concrete sJab
6" (15.2 cm}
90° elbows
6" (15.2 cm)
waft cap
90° eUbows(3)
12 feet (3.7 m) straight
Wall cap
Equivalent [ength of
6" (15.2 cm) round system
= 15 ft, (4.6 m)
= 12 ft, (3.7
m)
0 ft, (0 m)
= 27ft. (8.3 m)
Note: Flexible metal vent is Not recommended.
[f it is used, caUcuhte each foot (30 cm) of flexiMe vent
as two feet (61 cm) of straight metal vent. Flexible
metal elbows count twice as much as standard elbows.
Determine equivalent
length of vent. Maximum
equivalent
length of vent is 60 ft {18.3 m).
List the number
of each piece
and length
of straight
vent
you will
use.
Multiply
the equivalent
length
by the number
of pieces.
Add the totals
to get the total
equivalent
length
of your
system.
Vent
Piece
straight vent per lineal foot
3-1/4" x 10" (8.3 x 254 cm)
6" (15.2 cm) round
6" (15.2 cm) flexible
elbow
6" (t5.2 cm) round 45° elbow
6" (15.2 cm) round 90° elbow
_____?_ 3-1/4" x 10" (8.3x 25.4 cm)
flat elbow
3-1/4" x 10" (8.3 x 25.4 cm)
90" elbow
transition
to round
__c:_ ::_
3-1/4" x 10" (8.3 x 25.4 cm) to
i_-#_/:
6" (15.2 ore) 900 elbow
\
-
7/
......... _a
r flow
_
-1/4" x 10" (83 x 25.4 cm) to
6" (15.2 cm)
transition
to fiat
......_,
6" (15.2 cm) to 3-1/4" x 10"
_
(8.3 x 25.4 ore) 90o elbow
_J2_-_ air flow
_6"
15.2 cm) to
/-_ :7,_ Y' 3-1/4" x 10" (8 3 x 25.4 cm)
.... _ "q_
air flow
wall cap*
10" (8.3 x 25.4 cm)
6" (15.2 cm) round
roof cap*
lO,,x 10,,/254
x254 ore/
thermal break
6" (t5.2 cm) round
Equivalent
Length
1 ft. (30,5 cm)
t ft. (30.5 cm)
2 ft, (61 cm)
2.5 ft,
(76.2 cm}
5ft.
(1.5m)
12 ft,
(3,7 m)
5ft.
(1.5 m)
9ft.
(2.7 m)
4.5 ft,
(1.4 m)
5ft.
(t.5 m)
1ft.
(30.5cm)
0 ft.
(0 cm)
0 ft.
(0 era)
0 ft.
(0 cm)
2ft.
(61 era)
No. of
Pieces/
Length
Total
Equivalent
Length
Total equivalent vent system length
Length for required wall/roof cap has already been incorporated
into rating for maximum vent system length. A suitable wall/roof
cap must be used.
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