Three additional sizes have been added to this product line
To meet the higher pressure requirements of today’s water infrastructure systems, all 2- to 12-inch Mueller UL/FM swing check valves are now rated at 350 psig cold working pressure (CWP). In addition, the product line has been expanded to include 2-, 14-, and 16-inch sizes (with the largest two sizes still rated at 250 psig CWP). Standard features of Mueller UL-listed, FM-approved check valve product line now include: all ductile iron construction, bronze to BUNA seating, lifting rings, PN16 drilling, bosses for bypass connections, and a drain plug.
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SOURCE: Mueller Water Products