WATTS 9D, 1/2" Dual Check Valve Backflow Preventer $220.73 SKU: W9D12 P/N :W9D12Manufacturer :WATTS - 61935 Quantity discounts available QuantityPrice -+ Add to Cart Ships in 1-2 Business Days Product Features Fast ShippingEasy ReturnsSecure Payment Product DescriptionProduct DescriptionDual Check Valve Back Flow Preventer, 3/4" FNPT, With Intermidate Atmospheric Vent, Brass, Maximum 175 PSI