Liberty Pumps Pro680 Series Installation Manual page 5

Outdoor Basin Preparation
 1100-Series systems are not suitable for outdoor applications.
 Unless specifically noted, covers are not traffic rated.
For outdoor installation of a P680 system, an ARC18 Access Riser
and X8-D extension must be used. The ARC18 and X8-D
combination allows for outdoor installation up to 26 inches below
grade. Refer to Figure 1.
Figure 1. P680 Typical Outdoor Installation
Excavation
Excavate the hole as small as possible, with a minimum
recommended 8" diametrical clearance around the tank. Never
place the basin directly in contact with rocks or other sharp
objects. Place only fine, 1/8" to 3/4" pea gravel or 1/8" to 1/2"
washed, crushed stone as bedding between the basin and the
hole walls. Do not use sand or native soil as backfill. Properly
compact underneath the basin to provide a solid, level base that
can support the weight of the filled basin. It is recommended that
the top lip of the basin be level with the finished floor.
Initial Backfill
Use only fine, 1/8" to 3/4" pea gravel or 1/8" to 1/2" washed,
crushed stone around the bottom of the basin to hold it in place.
Do not use sand or native soil as backfill. Make the inlet
connection as required for particular basin.
8337000L
Inlet Connection
Pro-Series basins have a 4" inlet molded to the side of the tank.
This inlet is sized to accept a 4" no-hub type coupling. Connect
the gravity drainage line from the fixtures to this hub.
Final Backfill
Large rocks, clods, and foreign objects must be kept out of the
backfill material. Only fine, 1/4" to 3/4" pea gravel, or 1/8" to 1/2"
washed, crushed stone is recommended. Do not use sand or
native soil as backfill. Mound the backfill slightly and allow for
natural settling. Provide access to the basin cover for maintenance
AC18 Cover
and service.
AR18 Riser
Note: Do not exert heavy pressure or run heavy equipment on the
backfill material as this could cause the tank to collapse.
Installation
2" Pipe Seal
Grommet
2" Ball Valve
 All installation and maintenance of pumps, controls,
 All electrical and safety practices shall be in accordance with
X8-D Tank
Extension
2" Check Valve
 1100-Series systems are not suitable for outdoor applications.
Figure 2 shows a typical indoor installation. Variations may apply
P680-Series
to actual installation.
System
Copyright © Liberty Pumps, Inc. 2023 All rights reserved.
RISK OF ELECTRIC SHOCK
protection devices, and general wiring shall be done by
qualified personnel.
®
the National Electrical Code
Health Administration, or applicable local codes and
ordinances.
Ball valve
Duplex
Control
System
Figure 2. Typical Indoor Installation (Pro680 shown)
, the Occupational Safety and
Check valve
Vent
Union
Discharge
Use no-hub
style connector
4" inlet pipe
5 | EN