Balboa Standard Air Control [1-3/4" HS x 2-5/8" FD] [Gray] (10-2100GRY) aquacal When the printed legends begin

When the printed legends begin to wear out

This replacement is especially valuable when the original seal has leaked

This version is especially useful when the installation requires a 3/4 inch barbed tee format and a 1 amp

When the upper closure of a filter starts to fail

Balboa Standard Air Control [1-3/4" HS x 2-5/8" FD] [Gray] (10-2100GRY) aquacal When the printed legends beginAn air control helps homeowners fine tune the feel of a spa seat, and this Balboa Standard Air Control is designed for compatible gray finish applications using a 1 3 4 inch hole size and 2 5 8 inch face diameter where the original control has become stiff, worn, or less attractive than it should be. When an air control starts feeling tired, the whole seat can seem less enjoyable even if the rest of the system still works. The 1 3 4 inch hole size and