11.6 Rev. 10-18 Shaded area indicates changes MUELLER ® NO-BLO ® 3"-12" LINE STOPPER FITTINGS - MAXIMUM STOPPING PRESSURES Fitting H-17270 H-17271 Size 3" 4" 6" 8" 10", 12" 4" 6" 8" Stopper Selection Stopper Type S BS BC S BC BS BS SW S BC BS SW S BC BS BS SW SW S BC BS BS SW S BC BS BS SW S BC BS BS SW Stopper Cat. No. 88610 681990 680514 88614 680515 681991 681992 89694 682365 682364 681993 89696 88699 680517 681995 681996 89698 89704 682365 680515 681991 681992 89694 682365 682364 681993 681994 89696 88699 680517 681995 681996 89698 Maximum Pressure (at 100F/38C) Based on the lowest operating pressure rating of either the Stopper or stop-off ma- chine used Unit No. 2 Unit No. 3 No. 3SW No. 3SW-500 No. 4SW 100 - - - - 100 - - - - 100 - - - - 100 - - - - 100 - - - - 100 - - - - - - 275 275 - - - 275 275 - - 100 - - - - 100 - - - - - 275 275 - - - 275 275 - - 100 - - - - 100 - - - - 100 - - - - - 275 275 - - - 275 275 - - - - - 275 100 - - - - 100 - - - - 100 - - - - - - 275 500* - - - 275 500 - - 100 - - - - 100 - - - - 100 - - - - - 275 500* - - - 275 500 - - 100 - - - - 100 - - - - 100 - - - - - 275 500* - - - 275 500 - *500 psi if used with an enhanced line Stopper fitting manufactured after 1997. S=Solid rubber Stopper. BC=Solid rubber Bypass through top or bottom. D=Deferred completion Stopper. BS=Bottom Stopper. SW=Steel Wedge Stopper with polyurethane cover Bypass through top or bottom. All operating pressure are for current style stoppers.
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