Control Unit Solenoid Valve Assembly Replacement
High Quality Groundwater and Surface Water Monitoring Instrumentation
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Model 464 125 psi
®Teflon is a registered trademark of DuPont Corp.
Continued on page 2.
Tools and Materials Needed
1. 464 Solenoid Valve Assembly - 125 psi (Spare) (#111383)
2. 3/32" Allen Key
3. Small Utility Knife
4. 7/16" Wrench
5. 9/64" Allen Key
6. Teflon
®
Tape (for stainless steel threads)
7. Any suitable plastic adhesive (e.g. silicon)
Instructions
1. Turn the Control Unit off and remove the batteries.
2. Use the 3/32" Allen key to undo the four hex screws on the sides
of the Control Unit.
Hex
Screws
Hex
Screws
3. Remove the panel from the Control Unit and flip it over to access
the Solenoid Valve Assembly.
Panel
4. Use the small utility knife to break any adhesive seal that is holding
the Solenoid connector to the circuit board.
Solenoid Valve
Assembly
5. Carefully, pull to remove the Solenoid connector from the circuit
board.
464 Solenoid Valve Assembly - 125 psi (Spare)
Solenoid
Connector
Solenoid
Connector
6. Remove the tubing from the three fittings on the Solenoid Valve
Assembly, by pushing on the “grasping ring” on the fitting (to
release tubing) and pulling the tubing out.
Fitting “Grasping Ring”
Fitting “Grasping Rings”
