The Flowmeter is not indicating flow.

The Injector is not supplying adequate suction.

• Check pump, filters, and skimmers to ensure water is flowing through injector.
• Ensure that there is no debris clogged inside the injector.

The tubing is impaired.

• Check for kinks or clogs.
• Check for cracks or cuts.
• Check connections.
• Check that the check valve is installed with the arrow pointing towards the injector.
• Be sure that the check valve has not become fouled with debris. Disconnect the Ozone Tube from the injector. With the pump running, cover the end of the injector with your thumb, and feel for suction. If there is sufficient suction without the check valve, replace the check valve with a new one.