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Harmsco HB-20-20W
5" x 10" or 4
ResinTech® SIR-900 has minimal shrinkage/ swelling and low-pressure loss
32-130 °F
Dual Air Gap For Water Softener And Reverse Osmosis Systems THM Harmsco HB-20-20WCode Approved Dual Air Gap for Water Softeners And Reverse Osmosis Fits 1 1 2" or 2" PVC Pipe Air gap fittings are plumbing code required to mount in the drain line(waste line) of water treatment equipment and their primary purpose is to prevent non potable water from flowing backwards possibly mixing and contaminating potable (drinking) water. You might think of the function of an air gap fitting as a no fail check valve but without an internal seat
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