Pipe diameter
("D") undersized
reduces performance
Unsupported pipe
causes excessive
stress on pump and
fittings.
Do not install valves
in suction line.
No support or uneven
mounting not recommended.
Excess use of pipe fittings
means potential
air leaks.
Long run
not
recommended
Concentric Reducer causes
high spots along the suction line
resulting in
air pockets.
High suction
lift should be
avoided
High spot in suction
hose may result in
air pocket.
Avoid suction hose that may collapse
during operation due to insufficient
strength.
No strainer may
cause pump to
clog.
Insufficient bottom
clearance.
Vortex caused by
insufficient submergence
may cause pump to
lose prime.
Less than
4 x "D"
• Callouts in field of drawing apply to both suction con-
nections shown.
• Elbow immediately in front of pump intake not recom-
mended.
• Suction pipe sloping downward to pump inlet will trap air
which will reduce performance and may cause pump to
lose prime.
• Suction piping that is undersized will create excess friction
losses that may cause cavitation and a reduction in pump
performance.
• Excess fittings and bends in suction line results in trapped
air, reduced performance, and high friction losses which
may cause cavitation.
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