Printed in Canada
October 9, 2018
(#109095)
For further information contact: Solinst Canada Ltd.
Fax: +1 (905) 873-1992; (800) 516-9081 Tel: +1 (905) 873-2255; (800) 661-2023
35 Todd Road, Georgetown, Ontario Canada L7G 4R8
Purge/Grout Adaptor Operating Instructions
®Solinst is a registered trademark of Solinst Canada Ltd.
Model 403 7-Channel
Purging Option
Tools and Materials Needed for Purging
1. 1.7-Channel CMT Purge/Grout Adaptor Assembly
(#108130) Includes:
• Purge/Grout Adaptor
• 1 x Gear Clamp (#107095)
• 2 x Internal (#V130) O-ring (one extra) (#103807)
• 12 x Grout Plugs not required for purging (#104027)
• 1 x Hex Plug (#107096)
2. Set of 10 Standard Pie Plugs (#107836)
3. Model 464 Driveline Adaptor (#107117)
4. Tools from Standard 7-CH Installation
• 7-Channel Torque Driver (#107255)
• 1/8" Allen/Hex Wrench (#103408)
5. Solinst Model 464 Electronic Control Unit
(#109560 - 125 psi or 109966 - 250 psi)
or equivalent
6. 1/4" OD x 0.17" LDPE tubing
7. Compressed Gas (Air or Nitrogen)
8. Suitable Discharge Container
9. Standard/Slot Head Screwdriver
10.Pliers
Purge Adaptor Operating Principles
Once your CMT is installed to depth, the CMT Purge/Grout Adaptor is
placed over the top of the CMT and used to deliver gas (air or nitrogen)
down a 1/4" OD drop tube inserted into one CMT channel. The other
6 channels are plugged to avoid cross-contamination. The applied air
pressure “lifts” water from within the channel to discharge at surface.
Discharge travels up the annulus between the 1/4" OD drop tube and
the CMT channel, and out through the side-mounted Discharge on the
Adaptor. The Discharge is fitted with a short length of 1/4" OD tubing
to help direct the purged water to a suitable container.
An Electronic Control Unit should be used to supply and regulate the
gas through the Adaptor. A drive and vent cycle can be repeated manu-
ally or automatically, and adjusted to suit the permeability or recharge
rate of the formation you are purging.
Once channel developing/purging is complete, vent the Wellhead, re-
move the Adaptor, and rearrange the plugs to open the next CMT
channel for purging. A pressure relief valve is built-in to the adaptor to
avoid over-pressurizing the CMT channels.
Purge Adaptor Setup Instructions
1. Use the Allen/Hex wrench to loosen the 1/8" set screw on the
numbered CMT Wellhead Cap. Without rotating the Cap (to not
lose track of the channel numbers) slide it down the CMT about
2" (5 cm). Retighten the Wellhead Cap.
2. Using the torque driver, plug the CMT channels not being purged,
with the Standard Pie Plugs and Hex Plug.
3. Feed an appropriate length of 1/4" OD tubing to the desired depth
in the channel to be purged. To avoid injecting drive gas into the
formation, it is best to leave the lower end of the tubing well above
the port intake. Also, leave enough tubing at the Wellhead to reach
your gas source and Control Unit.
4. Be sure to keep the O-ring inside the base of the Adaptor. This will
ensure a seal between the Adaptor and the CMT tubing.
5. Feed the 1/4" tubing through the bottom of the Adaptor and up
through the top-mounted compression fitting. Lower the Adaptor
onto the CMT tubing by about 2".
6. Tighten the top-mounted compression fitting. Attach the Driveline
Adaptor to the other end of the tubing and to the Electronic Control
Unit.
7. Tighten the Gear Clamp at the base of the Adaptor to secure it to
the CMT.
8. Attach an appropriate length of 1/4" tubing to the Side-mounted
Discharge Compression Fitting on the Adaptor, to handle the
discharge.
Developing/Purging Instructions
1. Insert the discharge line into your collection container or flow cell.
2. Adjust the Control Unit “Regulator” to the appropriate pressure
setting [(depth to water in ft. x 0.43 psi/ft.) + 10 psi].
3. Adjust the drive and vent times on the Control Unit to suit your
recharge conditions and desired flow or discharge rate.
Note: 1/4" = 6 mm, 1/8" = 3 mm, 2"= 5 cm
Top-mounted 1/4"
Nylon Compression
Fitting
Pressure Relief
Valve (25 psi)
Side-mounted
Discharge
(1/4" Fitting)
Grout Plugs
Internal
(#V130) O-ring 7-Channel Wellhead
and Tubing
Standard Pie Plugs
Gear Clamp
Model 464
Driveline Adaptor
Hex Plug
(For Middle
Channel)
Note: When rearranging the plugs to purge/develop the next channel,
only loosen the hex/pie plugs enough to pull them from the
CMT channel. Use pliers to grab the top of the loosened plugs.
Be careful not to detach the bottom nut down channel.
Decontamination Suggestions
Follow your usual cleaning protocols and procedures. Wash the Adap-
tor with a small brush and suitable cleaning solution.
To avoid cross contamination through the 1/4" purge tube, it is sug-
gested to dedicate separate tubing to each channel.
