User Guide
Plumbing Design Assistance Manual l Chapter 4 – Pipe sizing l 49
Division B2.6.3.2.
Notes to Table 2.6.3.2.A.:
(1) The fixture unit values in this Table are not applicable in certain assembly occupancies because of surges in use by
the occupants. For such occupancies, refer to specific design information.
(2) For fixtures not indicated in this Table, refer to Table 2.6.3.2.D.
(3) Bathroom group is based on a ½-inch size bathtub supply pipe.
(4) Add additional fixture to the fixture load for bathroom group.
(5) Refer to manufacturer's recommendations.
(6) For fixture unit values for fixtures with direct flush valves, see Sentence 2.6.3.2.(4) and Tables 2.6.3.2.B. and 2.6.3.2.C.
Notes to Table 2.6.3.2.B.:
(1) The accumulative fixture unit values are the total values to be used in conjunction with Table 2.6.3.2.A.
Table 2.6.3.2.A. (Continued)
Private Use Hydraulic Load,
fixture units
Public Use Hydraulic Load,
fixture units
Fixture or Device
Number of Valves
Individual Fixture Unit Assigned
in Decreasing Value
Fixture Units in
Accumulative Values
(1)
Minimum Size
of Supply Pipe,
inches
Cold Hot Total Cold Hot Total
3
⁄
8
3
⁄
8
3
⁄
8
½
½
½
½
(5)
¾
3
⁄
8
½
3
⁄
8
3
⁄
8
1
Sink, kitchen domestic, greater than
8.3 LPM
Sink, laboratory
Sink, laundry (1 or 2 compartments)
Sink, service or mop basin
Sink, washup, per faucet
Shower head, 9.5 LPM or less per head
Shower head, greater than 9.5 LPM
per head
Shower, spray, multi-head, fixture unit
per head
Urinal, with direct flush valve
Urinal, with flush tank
Urinal, with self-closing metering valve
Water closet, 6 LPF or less with flush tank
Water closet, greater than 6 LPF with
flush tank
Water closet, with direct flush valve
1.5
-
1
-
-
1
1.5
1
(6)
3
2
2.2
3
(6)
1.5
-
1
-
-
1
1.5
1
-
-
-
-
-
-
1
2
3
4
5 or more
20
15
10
8
5 each
20
35
45
53
58, plus 5 for each additional fixture in excess of 5
2
-
1.4
-
-
1.4
2
1.4
(6)
3
2
2.2
3
(6)
1.5
1.5
1
2.25
1.5
3
3
3
(6)
3
4
2.2
5
(6)
1.5
1.5
1
2.25
1.5
3
3
3
-
-
-
-
-
-
2
2
1.4
3
2
4
4
4
(6)
3
4
2.2
5
(6)
2-50 Division B National Plumbing Code of Canada 2010
Table 2.6.3.2.B.
Sizing of Water Distribution Systems for Urinals with Direct Flush Valves
Forming Part of sentences 2.6.3.2.(4) and 2.6.3.4.(5)
NPCC table 2.6.3.2
Reproduced with the permission of the National Research Council of Canada, copyright holder.