999-995-411.10_REV A
Pipe Patch
19
Pipe Patching
1. Change gloves.
2. If needed, attach the ball & spring leader guide to
the front of the packer. The leader guide will help the
packer negotiate bends and p-traps. Otherwise, if not
using a pull rope at the front of the packer, securely
install the packer ball.
3. Securely attach the remaining air push rods, pull
ropes and air hose assembly to the packer. Tape the
connections to reduce the risk of resin getting in the
fittings or the connection from coming loose.
4. If needed, a small amount (up to 8 oz.) of an oil
type soap can be placed in the pipe to lubricate the
equipment as it is inserted.
5. Insert the packer assembly inside the pipe system.
Using the information learned from the test insertion,
work the patch into the place
(see Figure 7-5)
. When
the insertion mark on the air push rod or air hose
aligns with the pipe entrance, inspect the patch posi-
tion with the camera and confirm correct positioning.
Patch must be properly positioned prior to inflating
the packer. Confirm time since the resin was mixed.
Do not exceed the allowable working time. Wrapping
the camera inspection head spring with tape can help
to prevent resin from accumulating and drying in the
spring.
6. Attach the pressure regulator to the air push rod or air
hose.
7. Open the regulator valve. Pull the regulator knob and
slowly turn the regulator knob clockwise to inflate the
packer to the required air pressure
(Figure 7-6)
.
Refer
to the Specifications table
for pressure values for
specific packer size.
Note the time that the packer
was inflated. If you have exceeded the allowable
working time since the resin was mixed, the
packer/patch will need to be removed and you will
need to start with a new patch.
See Figure 34
.
Figure 34 – Pressure Gauge
Always use the pressure regulator on packer. Ex-
ceeding the maximum pressure, may result in the
packer rupturing. Incorrect inflation of packer could
result in the patch collapsing, or not opening up to the
full pipe diameter. This could also lead to the packer
becoming stuck in the pipe.
Once the packer is properly inflated, inspect the patch
position with the camera again to confirm correct.
Continue to monitor the air pressure to confirm that
it does not unexpectedly decrease. Do not shut the
regulator valve or change the air pressure.
Wipe up any spilled resin, allow to harden and dispose.
8. Allow the resin to cure for the appropriate amount
of time (“Set time”). Generally, the resin set time is
90 minutes. If the internal pipe temperature is below
50°F (10°C), set time is 180 minutes. If the pipe being
patched is outside of the resin application temperature
range, resin set time will be affected and further ad-
justments may need to be made. Lower temperatures
will increase set time and higher temperatures may
decrease set time.
FULL CURE TAKES PLACE AT 4
HOURS under normal conditions.
Do not depressurize the packer before the set time is
complete. This could cause improper sealing, failure of
the patch, and blockage of the pipe.
9. Depressurize the system to loosen the packer assem-
bly from the patch.
See Figure 7-7.
PSI
PREPARE THE PATCH AND POSITION THE PACKER IN
THE PROPER LOCATION
I
NFLATE THE PACKER TO THE REQUIRED PRESSURE.
ALLOW THE RESIN TO CURE FOR THE RESIN SET TIME
5
6
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