Jacuzzi Venturi System
Note: When trying to heat the Jacuzzi it is an good idea to keep this Dial closed at all times, as it sucks Cold Air in to the water channel.
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The Jacuzzi Venturi System or better known as an Air Control Dial, is situated on top of your Jacuzzi Shell. When opened, air is sucked in to the water channel, which increases the Jacuzzi Jets Pressure tremendously.