Mueller Co. offers a wide variety of steel drilling nipples for steel pipe with pressure ratings from 250 to 1440 psig.
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Sizes: 1" x 2", 1-1/4" x 2", 1-1/2" x 3", 2" x 3" Maximum working pressure: 250 psig
Sizes: 3/4" x 3", 1" x 3", 1-1/4" x 3", 2" x 3" Maximum working pressure: 250 psig
Sizes: 3/4" x 2", 3/4" x 3", 1" x 3", 1-1/4" x 3", 2" x 3", 3" x 6" Maximum working pressure: 250 psig
Sizes: 3/4" x 2", 3/4" x 3", 1" x 3", 1-1/4" x 3", 2" x 3", 3" x 3", 3" x 6" Maximum working pressure: 1440 psig
Sizes: 4" x 6"**, 6" x 12"**Maximum working pressure: 275 psig
Sizes: 4" x 6"**, 8" x 12"** Maximum working pressure: 720 psig
Sizes: 4" x 6"**Maximum working pressure: 960 psig