Galvanized Steel 1 in COMP x 1 in COMP Compression Coupling BK Products Dresser Couplings Vytl Controls Bolted Sleeve Type Couplings for Plain End Pipe OKVAL brand bolted sleeve couplings are used to join Plain End Pipe ,okval dresser coupling design has sleeves which slide over the pipe ends to which Dresser Coupling ductile iron pipe fitting and valve factory directly sale DRESSER PIPELINE SOLUTIONS 0065 0033 003 Style 65 Boltless Long Coupling, 1 1 4 in Nominal, Compression End Style, Malleable Iron Torrco Galvanized Dresser Coupling Long 2 in SiteOne US