Ispring UVF11A Installation Instructions & User Manual page 8

Step 2. Install one of the O-rings onto the open end of the quartz tube (about 5 mm from the
opening).
Step 3. Insert the quartz tube into the reactor chamber.
Step 4. Install the other O-ring onto the closed end of the quartz tube.
Step 5. Hand-tighten the closed-end nut onto the reactor chamber (where the closed end of
the quartz tube is). Do not over tighten.
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