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10
3'
0'
1' = 1'
4" 45˚
FRICTION LOSS EQUIVALENCE TABLES
EQUIVALENT
FEET OF PIPE
3" VENTED MODELS 2" VENTED MODELS
AFTER THE FIRST 10' OF 3" ONLY
4" EQUIVALENT TABLE
FITTING
DESCRIPTION
FITTING
DESCRIPTION
FITTING
DESCRIPTION
3" 90˚ 4" 90˚
EQUIVALENT
FEET OF PIPE
EQUIVALENT
FEET OF PIPE
3" 45˚
3" Coupling
3" Tee
3" Pipe
3" Concentric vent kit
3" V1000 vent kit
2" 90˚
2" 45˚
2" Coupling
2" Tee
2" Pipe
2" Concentric vent kit
5'
4" Coupling
4" Tee
4" Pipe
3'
0'
5'
3'
0'
0'
1' = 1'
3'
3'
0'
1'
0'
1' = 1'
0'
GRAND TOTAL
VENT LENGTH
(FEET) WITH
FITTING FRICTION
LOSS ADDED
TOTAL FRICTION
LOSS FOR
ELBOWS
EQUIVALENT
FRICTION LOSS
(FEET) FOR EACH
ELBOW
VENTING EXAMPLES (NOTE: SHOWN AS INTAKE & EXHAUST PIPE FITTINGS ADDED TOGETHE
R
* = MINIMUM VENT LENGTH ** = MAXIMUN VENT LENGTH
QTY. OF 90˚
ELBOWS
TOTAL COMBINED
VENT LENGTH
(FEET) INTAKE &
EXHAUST
*12
20
20
20
20
20
20
20
20
20
20
20
20**
30
30
30
30
30
30
30
30
30**
40
40
40
40
40
40
40**
50
50
50
50
50**
60
60
60**
70**
2
2
3
4
5
6
7
8
9
10
11
12
13
3
4
5
6
7
8
9
10
11
3
4
5
6
7
8
9
3
4
5
6
7
3
4
5
3
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
10
10
15
20
25
30
35
40
45
50
55
60
65
15
20
25
30
35
40
45
50
55
15
20
25
30
35
40
45
15
20
25
30
35
15
20
25
15
22
30
35
40
45
50
55
60
65
70
75
80
85**
45
50
55
60
65
70
75
80
85**
55
60
65
70
75
80
85**
65
70
75
85
85
80
85**
75
80