Waterway 1/2" Air Control [1-5/16" HS / 1-11/16" FD] [Straight Nut] [Deluxe Scalloped] [White] (660-3100) airsupply equipment label

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and this Balboa VS510SZ BP7 4 kW Retrofit Kit is designed for compatible applications where the original control pack has become unreliable or outdated

This model is especially useful in applications where hands-on manual operation is not the preferred control method and a pneumatic setup is already part of the system design

The Hayward union elbow is designed for compatible plumbing applications where a 1-1/2 inch MPT to 1-1/2 inch MPT angled union connection is needed

Waterway 1/2" Air Control [1-5/16" HS / 1-11/16" FD] [Straight Nut] [Deluxe Scalloped] [White] (660-3100) airsupply equipment labelThe Waterway 660 3100 air control is designed for compatible 1 2 inch air control applications using a 1 5 16 inch hole size and a 1 11 16 inch face diameter. Its straight nut configuration and deluxe scalloped styling make it a useful option for installations where both reliable function and a more decorative finish are important. This control helps manage the air introduced into the spa system, allowing the user to adjust the character of the jet