9. Replacing the Non-Retraction Valve
A water Non-Retraction Valve is integrated in the coupling joint (the product below), which shuts off the water retraction
directly at the handpiece head to prevent fluids infiltrating the water line. If water is beginning to leak from the
handpiece, replace the Non-Retraction Valve.
Brasseler / NSK Coupling
1) Remove the coupling joint from the hose.
2) Remove the back-end gasket.
3) Pull and remove the water tube, and replace the Non-Retraction Valve.
4) Insert the new Non-Retraction Valve securely and remount the back-end gasket.
*Refer to Spare Parts List to identify the correct parts.
Fig. 12
Non-Retraction Valve
Gasket
Summary of Contents for NL4500
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