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8"(15.2 era) round metal vent
8"(15.2 era)transition
Determine
equivalent
Jength of vent. Maximum
equivalent
length of vent is 60 ft (18.3 m).
List the number
of each piece and Uength of straight
vent
you will
use.
MuffipUythe equivalent Uengthby
the number
of
pieces.
Add the totals
to get the totaU equivalent
Uength of your
system.
5" (15.2 era)
max.
_
\ 5" (15.2 era)
round 90° PVC
Tightly pack gravel or sand
round 99°
sewer pipe elbow
eornpleteJy around pipe.
PVC sewer
pipe elbow
optional vent arrangement under
concrete slab
t2" (30.5 era)
5" (15.2 cm) round transition
well
i l_
42"
6"
i
(106.7 era)
(15.2 era)
max.
rain.
6" (15.2 era) round
PVC coupling
90° PVC sewer
pipe elbow
Tightly pack gravel or sand
completely around pipe.
optional vent arrangement through
window welt under concrete slab
90° eUbows(3)
= 15 ft. (4.6 m)
12 feet (3.7 m) straight
= 12 ft. (3.7 m)
WaHcap
= 0ft.(0m)
EquivaUentUengthof
6" (15.2 cm) round system
= 27ft. (8.3 m)
Note: Flexible metal vent is Not recommended.
If it is used, calculate each foot (30 cm) of flexible vent
as two feet (61 cm) of straight metal vent. Flexible
metal elbows count twice as much as standard elbows.
Vent
Piece
straight vent per lineal foot
3-I/4" x 19" (83 x 25.4 cm)
6" (152 cm) round
1ft. (30.5cm)
1ft, (30.5cm)
6" (152 cm) flexible
2 ft.
elbow
6" (152 cm) round 450 elbow
6" (152 cm) round 99" elbow
_
---_, 3-I/4" x 10" (8.3 x 25.4 crn)
_:9 flat elbow
3-1/4" x 19" (8.3 x 25.4 crn)
90° elbow
transition to round
_ _::_=__ 3-1/4" x 10" (8.3 x 25_4cm) to
6"<15.2 ore/99" elbo
-(-_¢_
air flow
_
-1/4" x 10" (8.3 x 25.4 crn) to
6" (15.2 ern)
transition to flat
i_;_'1 6" (15.2 cm) to
b-r:=_:'_ I' 3-1/4" x 19" 8.3 x 254 cm)
_'_
air flow
wall cap*
[_;_>
3-1/4" X 10" (8.3 X 25.4 crn)
_'_j_
6" (152 cm) round
roof cap*
19,,× 19,,/954
x254
thermaJ break
-_
6" (152 cm) round
{6t cm)
2.5 ft.
(76,2 m)
5 ft.
(1,5 m}
12ft.
(3,7 m)
5 ft.
(1,5 m)
9 ft.
(2.7 m)
4.5 ft.
(1,4 m)
5 ft.
(1,5 m}
1 ft.
(30,5cm)
9 ft.
(9 era)
9 ft.
(9era)
9 ft,
(9 era)
2 ft.
(6t era)
No. of
Pieces/
Length
Total
EquivaJent
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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