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RECOMMENDED SYSTEM SPECIFICATIONS
ACCEPTABLE PIPE SIZE FOR MAXIMUM
RECOMMENDED
SYSTEM FLOW RATE PER APSP-7
(6 FT/SEC IN THE BRANCH LINE)
Pipe Size
Flow rate
[mm]
GPM
[Liter/Min]
1 ½"
40
[50]
[150]
2"
63
[63]
[240]
WGX1048E Suction Outlet Covers are rated for Floor Only at 125 GPM
WG1048EW Suction Outlet Covers are rated for Wall or Floor at 72 GPM
In the event of one suction outlet being blocked, the remaining suction outlets serving that system shall have a
flow rating capable of the full flow of the pump(s) for the specific suction system.
Example: In the System shown in Diagram 1, two (2) "Floor Only" suction outlet covers are selected and mounted.
These covers are individually rated for 125 GPM. For a desired flow rate through the pump of 100 GPM, a minimum
pipe size from the Chart 1 is selected at 3". At the desired flow of 100 GPM one cover could be partially blocked
and the other suction outlet flow would be below the rated 125 GPM of the "Floor" mounted suction outlet cover.
Since there are two outlets flowing in normal operation, and the allowable velocity in the interconnecting piping is
only 3ft/sec, the same pipe size is required in the interconnecting piping.
Example: In the System shown in Diagram 2, one (1) "Floor Only" suction outlet cover, rated at 125 GPM, and one (1)
"Wall or Floor" suction outlet cover, rated at 72 GPM are selected and mounted. For a desired flow rate through the
pump of 50 GPM, a minimum pipe size from the Chart 1 is selected at 2". At the desired flow of 50 GPM either
cover could be totally blocked and the other suction outlet flow would be below the rated 72 GPM of the wall
mounted suction outlet cover. Note: Flow may be limited by entrapping force in dual suction systems.
Diagram 1
DUAL SUCTION OUTLET SET
Pipe Size
Flow rate
[mm]
GPM [Liter/Min]
2 ½"
[75]
3"
[90]
Chart 1
Floor Outlets,
Total system rated
flow 125 GPM
Interconnecting
piping
System
Branch piping
90
[340]
138
[522]
Total System rated
flow 72 GPM
125 GPM Rated
Floor
ISDUALSWG REV D
:
FIG 1
Note: 1" Hg = 1.13 Ft of Head
Wall
72 GPM rated
Interconnecting
piping
System branch piping
Diagram 2
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