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Amazon.com: Dual Air Gap for Water Softener and Reverse Osmosis with 1-1/2 inch and 3/8 or 1/4-inch inlets, 1-1/2 or 2-inch Standpipe (8500, GAP-CAP, AG130-001) : Tools & Home Improvement
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Universal Air Gap for Water Softeners and Filters with 1/2-inch OD or 5/8-inch ID Inlet Port and 1-1/2-inch or 2-inch Drainpipe Outlet (AG100-001, MR. DRAIN, 34700) - - Amazon.com
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Universal Air Gap for Water Softeners and Filters with 1/2-inch OD or 5/8-inch ID Inlet Port and 1-1/2-inch or 2-inch Drainpipe Outlet (AG100-001, MR. DRAIN, 34700) - - Amazon.com
Idea for simple air gap for softeners and backwashing filters | Terry Love Plumbing Advice & Remodel DIY & Professional Forum
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Water Softener Air Gap for installation in Washing Machine box with 2-inch Drainpipe (61-S, GAP-IT, AG140-001) - - Amazon.com
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