OM−05850
G-R
PAGE B − 2
INSTALLATION
DISCHARGE PIPE
DISCHARGE
CHECK VALVE
PUMP DISCHARGE
SELF-PRIMING
CENTRIFUGAL
PUMP
SUCTION
LINE
SUPPORT
BRACKET
90
_
ELBOW
WET WELL
OR SUMP
BLEED LINE 1.25"
(31 MM) DIA. MIN.
(CUSTOMER FURNISHED)
EXTEND 6" (152 MM) BELOW
PUMP OFF LIQUID LEVEL
1" UNION
STREET TEE
INSTALL AIR RELEASE VALVE
IN HORIZONTAL POSITION
CLEANOUT
PLUG
Figure B−1. Typical Automatic Air Release Valve Installation
When connecting Air Release Valve piping,
apply pipe sealant with teflon to the
threads and
do not
over-tighten connec-
tions. Over-tightening connections could
strip threads in the Air Release Vavle, re-
sulting in leakage or damage to the valve.
The valve inlet line must be installed between the
pump discharge port and the non-pressurized side
of the discharge check valve. The lower body has
an arrow indicating the direction of flow and the in-
let is provided with standard 1-inch NPT pipe
threads.
The valve outlet is equipped with standard
1−1/4-inch NPT pipe threads and should be con-
nected to a street tee to facilitate cleaning in case
the Air Release Valve becomes clogged. Connect
a bleed line the same size as the valve outlet to the
street tee so the line slopes back to the wet well or
sump. If
piping
is used for the bleed line, avoid the
use of elbows whenever possible.
NOTE
It is recommended that each Air Release Valve be
fitted with an independent bleeder line directed
back to the wet well. If multiple Air Release Valves
are installed in a system, they
must
be fitted with in-
dependent bleeder lines;
never
use a common
manifold pipe. Contact your Gorman-Rupp dis-
tributor or the Gorman-Rupp Company for informa-
tion about installation of an Automatic Air Release
Valve for your specific application.
If the liquid to be pumped contains large entrained
solids, grease or other substances likely to cause
clogging, use smooth-bore hose the same size
(1−1/4-inch) as the outlet. Air and liquid vented
during the priming process will agitate the hose,
loosening any build-up, greatly reducing the
chance of clogging.
A bypass line returned to a wet well could
be drawn into the pump suction inlet,
which could result in damage to the sys-
