LEGIOMIX Station sizing and selection procedure
3
A. Obtain the maximum GPM (demand) of domestic hot water from project documentation.
B. Select station size which has a Max GPM value equal to or greater than the project maximum GPM demand.
(1) The maximum GPM rating for the LEGIOMIX station is based on 5 feet per second pipe velocity in the station's
copper tubing. This velocity recommendation is for water temperatures up to 140°F and is from the UPC (Uniform
Plumbing Code) and the CDA (Copper Development Assocation) "Copper Tube Handbook". To minimize the
potential of erosion-corrosion in the station piping, do not exceed 5 fps velocity.
(2) The PSI/GPM table is for reference only, showing various GPM values at various pressure drops across the
station.
Pressure drop across station (PSID)
1
1.5
2
3
5
7.5
Station size
2Flow rates (GPM) @ above pressure drop
1"
7.8
9.5
11.0
13
17
21
1¼"
9.0
11
13
16
20
25
1½"
20
24
28
34
44
54
2"
38
47
54
66
85
105
2½"
43
52
60
74
96
117
Station Code
Station Size
1Max. GPM
(@ 5 fps pipe
velocity)
Station Cv
6000
66AS
1"
14
7.8
6000
76AS
1¼"
20
9
6000
86AS
1½"
29
20
6000
96AS
2"
50
38
6000
60AS
2½"
76
43
