TM075341
Inlet pipe with a gradual upward slope towards the
pump
Example:
Pos. Description
1 Inlet and outlet port
2 Union nut
3 Pipe fitting
5.2.1 Inlet and outlet pipes
Follow these general precautions when connecting
the inlet and outlet pipes.
Do not let the pump support the pipes. Use
pipe hangers or other supports at proper
intervals to provide pipe support near the
pump.
The internal diameter of the pipes must
never be smaller than the diameter of the
pump ports.
• Install the pipes so that air pockets are avoided,
especially on the inlet side of the pump.
• Use eccentric reducers with the tapered side
down.
• Make sure the pipes are as straight as possible
to avoid unnecessary bends and fittings. We
recommend long-radius 90 ° pipe bends to
decrease friction loss.
• Run the inlet pipe as direct as possible and,
ideally, make sure that the length is at least ten
times the pipe diameter.
• If possible, run a horizontal inlet line. We
recommend a gradual upward slope for pumps
operating in suction-lift conditions.
• A short pipe must be of the same diameter as the
inlet port or larger.
• A long pipe must be one or two sizes larger than
the inlet port, depending on the length.
TM040338
Recommended pipe installation to avoid friction and
air pockets
TM075387
Correct pipe sizing for connection to the pump inlet
or outlet
5.2.2 Maximum tapping point
We recommend that you install the unit so that the
height between the unit and the highest tapping point
does not exceed the values shown in the table
below.
TM075383
Maximum tapping point
9
English (GB)
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