Wilkins Air Gap Drains
Wilkins: AG-11 -  1/2"-1" Air Gap For a 375,375XL RP
$43.00
Wilkins: AG-12 - 1 1/4" - 2" Air Gap for a 375XL RP
$55.15
Wilkins Air Gap for 1/2" 975XL 
$50.50

Wilkins AG-4 - 3/4"-1" Air Gap Adapter for installing drain lines for 975 RP

$52.50

Wilkins: AG-5 - 975 RP, Air Gap Adapter for installing drain lines, 1 1/4" - 2"

$70.70