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The AQUALINE GPN-30-18 is a Schedule 40 galvanized steel pipe nipple measuring 3 inches in diameter by 18 inches in length. Galvanized steel construction provides corrosion resistance suitable for water supply, industrial piping, and general plumbing applications. The Schedule 40 wall thickness meets standard pressure requirements for threaded pipe systems. Licensed plumbers and pipefitters install this nipple to extend or connect runs in black and galvanized pipe systems. At 11.3 pounds, it is a solid, full-body nipple suited for demanding service conditions.
This nipple is used in residential and commercial plumbing, fire suppression, and industrial piping systems where threaded galvanized steel connections are specified. It is a common component in water distribution lines, irrigation headers, and mechanical room piping where corrosion resistance and schedule-rated wall thickness are required. The 3-inch diameter makes it appropriate for main supply lines and larger branch connections in commercial builds.
Designed as an OEM-style replacement and standard-fit component for Schedule 40 threaded galvanized steel piping systems using NPT connections.
Installation should be performed by a licensed plumber in accordance with local plumbing codes and the International Plumbing Code (IPC). Shut off the water supply and depressurize the line before removing or installing any threaded nipple. Apply an appropriate pipe thread sealant or PTFE tape to all NPT threads before making up connections. Do not over-tighten threaded joints, as this can damage fittings or crack female-threaded components.
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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