Mueller Streamline 571-040 is a 4" x 4" nipple in galvanized steel.
A nipple is a short length of pipe threaded on both ends; the first figure is the pipe size and the second the overall length, threads included.
Galvanized nipples are Schedule 40 steel pipe with a zinc coating, threaded NPT on both ends. They pair with galvanized malleable fittings on air, non-potable water and outdoor lines where bare black steel would rust.
Specifications
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Brand: Mueller Streamline
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Manufacturer Part #: 571-040
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Size: 4" x 4"
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Type: Nipple
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Material: Galvanized steel pipe, Schedule 40
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Threads: NPT, both ends (ASME B1.20.1)
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UPC: 032888102835
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Category: Galvanized Nipples
See also: all galvanized nipples, galvanized fittings, thread sealant, all Mueller Streamline.