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The Mueller Streamline 581-035 is an iron pipe nipple sized 1/4 inch by 3-1/2 inch manufactured from black iron steel for pipe-fitting applications. It functions as a short threaded connector between pipe lengths and fittings for plumbing, HVAC, and general fluid-handling systems. The component corresponds to part number BLPN-025-3.5 (SKU) and UPC 32888103078, and is intended for standard threaded pipe connections.
Threaded iron pipe nipple for standard fittings and short pipe runs
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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