The Ultra violet tube weakens due to usage, and thus must be changed regularly. Even though it may still glow, the output of the tube cannot be determined by the naked eye. So regular replacement is the only way to ensure “peak performance”. Thus the tube in the pond U.V. units can be replaced every 12 months (approx. 8000hrs) and in our professional and aquarium range every 6 months (approx 4000hrs).

Replacing the tube in units without a Quartz sleeve.

· Disconnect the unit from the water and power supply, remove the clear end caps and gently pull the electrical connector off the ends of the tube.
· Unscrew the blue locking nuts and remove the O-rings.
· Remove the tube.
· Make sure there is no water inside the unit before installing the new tube.
· Replace the O-rings with new ones.
· To install the new tube, just reverse the above procedure.
· When installing the new tube do not over tighten the blue nuts.
· Check for leaks before turning the U.V. power on.

Replacing the tube in units with a Quartz sleeve.

· Disconnect the unit from the power supply, remove clear end caps and gently pull the electrical connectors off the ends of the tube.
· Remove the tube from the Quartz sleeve.
· To install the new tube just reverse the above procedure.

Removing the Quartz sleeve.

The quartz sleeve should be inspected every two to three months as dirt build up or calcification can occur. This will affect the efficiency of the U.V. unit.

· Follow the above steps to remove the tube.
· Unscrew the blue nuts and remove the O-rings.
· Gently remove the Quartz sleeve and inspect.
· If the Quartz sleeve needs cleaning use soapy water or a plastic kettle de-scaler.
· Dry the quartz sleeve and re-install sleeve and tube.
· Do not over tighten blue nuts
· Check for leaks before turning the U.V. power on.

Safety.

U.V. light can be harmful to your eyes or skin. NEVER operate a tube outside the unit. A blue glow will be seen through the clear end caps and the will confirm the tube is on, the U.V. content of this light is not harmful and the unit is completely safe in normal use.