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Series FBV-3-Press XLC 2-Piece, Full Port, Brass Ball Valves with Integral Press Fitting End XLC Connections are designed for use in ProPress® piping systems. They feature a DZR brass body and adapter, and blowout proof, bottom-loaded stem. Series FBV-3-Press XLC comes with XLC connections designed for types K, L and M hard copper tubing in 2 1/2 to 4 in. (65mm – 100mm).