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SELECT A PROPERLY SIZED BIG MOUTH™ FLOW THROUGH PLUG(S)
ATTACH A POLY LIFT
LINE OF PROPER LENGTH
TO THE EYEBOLT AND
INFLATION VALVE
ATTACH A PROPER LENGTH
BYPASS HOSE BY PUSHING
HANDLES DOWN, LOCKING
FITTING TO ADAPTER
ATTACH A BYPASS HOSE ADAPTER
USING PIPE SEALANT
17. SPECIAL USAGE INSTRUCTIONS FOR GRAVITY FLOW BYPASS
APPLICATIONS
A. PREPARATION BEFORE USE
a. Read, understand and follow all the warnings and instructions outlined
in this Safety Instruction Manual before proceeding.
b. Determine the pipe size to be blocked and the required back pressure.
Select the properly sized Big Mouth® Flow Through plug(s) for the pipe
(refer to chart on page 46).
c. Select bypass adapter(s) for the plug(s) and a bypass hose assembly
of suitable length for the application. Attach the adapter(s) to the Big
Mouth® Flow Through Plug bypass tube using a suitable pipe sealant.
Attach the bypass hose assembly to the plug(s) and pull down the locking
tabs to secure the hose to the plug.
d. Select a Poly Lift Line(s) with internal ination hose of proper length
to allow plug ination and deation from outside the Danger Zone. Attach
the Poly Lift Line(s) to the plug(s).
B. PLUG PLACEMENT
a. Place the plugs into the pipeline a minimum distance of one pipeline
diameter (refer to Section 10 of this manual).
b. Construct a backup system as required for the installation (refer to
Section 11 of this manual).
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