Mazzei ozone injector

This Mazzei venturi injector is where the ozone gas begins to mix and dissolve in the water.

The water flows through the 3/4-inch pipe, and sucks in ozonated air through a thin pipe that runs from the ozonator to the injector.

When pressurized water enters the injector inlet, it is constricted toward the injection chamber and changes into a high-velocity jet stream. The increase in velocity through the injection chamber results in a decrease in absolute pressure, creating a vacuum, thereby enabling an additive material to be drawn through the suction port and entrained into the water stream. As the jet stream is diffused toward the injector outlet, its velocity is reduced and it is reconverted into lower pressure energy.

Be aware that installing an injector can be complicated. The venturi effect will only work if you have a significant pressure difference across the injector; i.e. maximum inlet pressure and minimum outlet pressure. Spa manufacturers do a lot of testing to find the optimal location for the ozone injector; be prepared to do the same if you install your own injection system.

We do not supply this injector spare parts separately (see picture 2).

Part numbers
Mazzei: 684K-MAZ