GROCO 2.5-Inch NPT Bronze Full Flow Pipe Nipple

The GROCO PN-2500 full-flow pipe nipple is a straight threaded connector for marine systems that need an uncomplicated NPT-to-NPT transition. It is useful when two female-threaded components must be joined without adding a bulky union or adapter stack. A cast-in wrench flat gives the installer a dedicated surface for tightening and later removal. The full-flow bore helps avoid creating an unnecessary restriction in a properly sized plumbing run.

Using one purpose-built nipple also removes the extra joints that would result from combining shorter adapters to make the same connection. That limitation is important when separating raw-water, sanitation, and utility circuits from drinking-water systems during a refit. GROCO casts the PN-2500 from C83600 marine bronze for service in compatible onboard plumbing systems. The bronze used for this fitting is not NSF-61 compliant, so the nipple is not intended for potable-water plumbing.

• Cast-in wrench flat for installation and removal
• Straight NPT-to-NPT threaded connection
• Not intended for potable-water systems
• Full-flow internal passage

Apply thread sealant appropriate to the system fluid and fitting materials, then tighten the PN-2500 using the wrench flat rather than gripping the threaded section. Support the components on both sides so pipe weight and vibration do not continually load the nipple. Once the circuit is pressurized, inspect both connections for seepage and recheck them after the system has gone through several operating cycles. For other threaded valves, nipples, and marine plumbing fittings, browse Marine Pipe Fittings.