Waterway 1" Air Venturi Control Valve - Lo-Pro - Square Notched
Waterway 1" Air Venturi Valve - Square Notched - marked on the cap 'AIR' - textured top. Sometimes with chrome cap plate. Used on Stylus spas and others 10+ years ago.
OBSOLETE - Use Waterway 1" air control valves listed above
68mm Diameter cap, 41mm hole required Apparently also made by Hydroair - also obsolete.
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