IN
C
H
E
S
m
m
H
O
R
I
Z
O
N
T
A
L
V
E
R
T
I
C
A
L
G
P
M
1
/
1
6
1
/
8
1
/
4
1
/
2
Total for Stack
Total of One
Branch Intervals
1 1/4" 40 1 1 0.51 1/2" 40 2 2 1 3 4 8 2
2" 50 8 16 4 21 26 6 10 24 62 1/2" 63 14 32 7 24 31 12 20 42
9
3" 75 36 48 18 42 2 50 2 20 2 48 2 72 2 20 2
4" 110 216 256 108 180 216 250 160 240 500 905" 125 428 600 214
390 480 575 360 540 1,100 2006" 160 720 1,380 360 700 840 1,000 620
960 1,900 3508" 200 2,640 3,600 1,320 1,400 1,600 1,920 2,300 1,400
2,200 3,600 60010" 250 4,880 5,600 2,440 2,500 2,900 3,500 4,200
2,500 3,800 5,600 1,00012" 315 8,200 8,400 4,100 2,900 4,600 5,600
6,700 3,900 6,000 8,400 1,50015" 400 7,000 8,300 10,000 12,000
7,000
SLOPE REQUIREMENT:INSIDE BUILDING
PERCENTAGE IN PER FOOT MM PER METER4" DIAMETER= 2% 1/4 21
OUTSIDE BUILDING4" DIAMETER AND LARGER= 1% 1/8 11
0.50% 1/16 5.21.00% 1/8 102.00% 1/4 214.00% 1/2 42
NOTE:DISTANCE BETWEEN MANHOLES SHALL NOT EXCEED 300 FT
(90METERS)
MAXIMUM UNIT LOADING AND MAXIMUM LENGTH OF DRAINAGE AND VENT
PIPING
MAXIMUM UNIT LOADING AND MAXIMUM LENGTH OF DRAINAGE AND VENT
PIPINGby UPC
Slope per foot
MAXIMUM FLOW AT MANHOLE
SIZE OF PIPE MAXIMUM UNITS DRAINAGE PIPING
228UNLIMITED
118.6UNLIMITED 600 118.6155.0228.0 3,600
UNLIMITED 1,380 155
UNLIMITED 256 91.264.5UNLIMITED 84 64.591.2
54.725.8UNLIMITED 24 36.545.0
TABLE 11.5.1A by PHCC BUILDING DRAINS AND SEWERS1
VENT PIPING HORIZONTAL
AND VERTICAL
13.7
TABLE 11.5.1B by PHCC HORIZONTAL FIXTURE BRANCHES
AND STACKS
V
E
R
T
I
C
A
L
M
A
X
I
M
U
M
U
N
I
T
S
M
A
X
I
M
U
M
L
E
N
G
T
H
,
m
(Maximum number of Fixture Units that may be Connected to:)
(Maximum number of Fixture Units that may be Connected to any
Portion of the building drain or the building sewer)
13.7 1
Any Horizontal Fixture Branch1
MAXIMUM LENGTH DRAINAGE PIPING, m
One Stack of Three Branch intervals or less
Stacks with more than three Branch
intervals
1. On site sewers that serve more than one building may be sized
according to the current standards and specifications of the
Administrative Authority for the public sewers.
1. Does not include branches of the building drain
2. Not more than 2 water closets or bathroom groups within each
branch interval nor more than 6 water closets or bathroom groups on
the stack. (Stack shall be size according to the total accumulated
connected load at each story or branch interval and may
2. Not over two water closets or two bathroom groups, except
that in single family dwellings, not over three water closets or
three bathroom groups may be installed.
H
O
R
I
Z
O
N
T
A
L
19.8UNLIMITED 8 18.2UNLIMITED
UNLIMITED 48
