Natco ANSI Z 21.10.3, Service Manual

Page: 8 / 40

PAGE: 8
VENTING EXAMPLES (NOTE: SHOWN AS INTAKE & EXHAUST PIPE AND FITTINGS ADDED TOGETHER)
* = MINIMUM VENT LENGTH ** = MAXIMUM VENT LENGTH
TOTAL EQUIVALENT GRAND TOTAL
COMBINED FRICTION TOTAL VENT LENGTH
VENT LENGTH LOSS FRICTION (FEET)
(FEET) QTY. (FEET) LOSS WITH FITTING
INTAKE &
OF 90 °
FOR EACH FOR FRICTION
EXHAUST
ELBOWS
ELBOW ELBOWS LOSS ADDED
*12 2 5 10 22
20 2 5 10 30
20 3 5 15 35
20 4 5 20 40
20 5 5 25 45
20 6 5 30 50
20 7 5 35 55
20 8 5 40 60
20 9 5 45 65
20 10 5 50 70
20 11 5 55 75
20 12 5 60 80
20** 13 5 65 85**
30 3 5 15 45
30 4 5 20 50
30 5 5 25 55
30 6 5 30 60
30 7 5 35 65
30 8 5 40 70
30 9 5 45 75
30 10 5 50 80
30** 11 5 55 85**
40 3 5 15 55
40 4 5 20 60
40 5 5 25 65
40 6 5 30 70
40 7 5 35 75
40 8 5 40 80
40** 9 5 45 85**
50 3 5 15 65
50 4 5 20 70
50 5 5 25 75
50 6 5 30 80
50** 7 5 35 85**
60 3 5 15 75
60 4 5 20 80
60** 5 5 25 85
70** 3 5 15 85
FRICTION LOSS EQUIVALENCE TABLES
2" VENTED MODELS AFTER THE FIRST 10’ OF 3"
3" VENTED MODELS SSV100-45R/SSV130-45R ONLY4" EQUIVALENT TABLE
EQUIVALENT EQUIVALENT EQUIVALENT
FITTING FEET FEET FITTING DESC. FEET OF
DESC. OF PIPE FITTING DESC. OF PIPE PIPE
3” 90 5’ 2” 90 5’ 4” 90 3’
3” 45 3’ 2” 45 3’ 4” 45 1’
3” Coupling 0’ 2” Coupling 0’ 4” Coupling 0’
3” Tee 0’ 2” Tee 0’ 4” Pipe 1’ = 1’
3” Pipe 1’ = 1’ 2” Pipe 1’ = 1’ 4” Tee 0’
3” Concentric vent kit 3’ 2” Concentric vent kit 3’
3” V1000 vent kit 0’