Installation And Connections - Liberty Pumps Pro370 Serie Mode D'emploi

3. Installation and Connections

A. Discharge: Using an adapter, connect the discharge
pipe to the threaded 2" or 3" port provided on the cover.
IMPORTANT: Do not reduce the discharge pipe size
below that which is provided on the pump. Sewage
pumps should not be smaller than 2".
applications, it may be necessary to increase the pipe
size to reduce friction losses. Contact Liberty Pumps if
you have questions regarding proper pipe sizes and
flow rates.
Install the remaining discharge line. A union should be
installed just above the cover to facilitate pump removal
if necessary. A check valve is recommended after the
union to prevent the backflow of liquid after each
pumping cycle. A gate or ball valve should follow the
check valve to allow periodic cleaning of the check
valve or removal of the pump. The remainder of the
discharge line should be as short as possible with a minimum number of turns, to minimize friction head loss. Do not restrict the
discharge below 2" in sewage applications. Larger pipe sizes may be required to eliminate friction head loss over long runs.
Contact Liberty Pumps or other qualified person if there are questions regarding proper pipe size and flow rates.
B. Vent: A threaded 2" or 3" connection is provided on top of the cover which must be piped to the existing building vent, or extended
outside on its own standpipe. The vent size should be in accordance with applicable codes, but not less than the discharge size.
Note: Pro-Series systems shipped with steel pipe option have a rubber grommet seal on the discharge instead of female NPT
connections.
In some
Typical Installation
This is a recommended installation only. Variations may apply.
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