GROCO Bronze Pipe Nipple - 2" NPT

The GROCO Bronze Pipe Nipple – 2" NPT (PN-2000) is a cast-bronze, threaded connection fitting designed for marine plumbing, fuel systems, and fluid transfer applications where corrosion resistance and reliable flow are essential. Cast from C83600 bronze—a copper-tin alloy prized for its durability in saltwater and freshwater environments—this 2-inch NPT (National Pipe Thread) nipple provides a full, unobstructed flow path and features cast-in wrench flats that simplify installation and removal without requiring additional tools or adapter wrenches.

C83600 bronze offers superior corrosion resistance compared to ferrous materials, making it the standard choice for offshore applications, deck systems, and engine cooling lines exposed to salt spray and moisture. The NPT x NPT male-to-male configuration accommodates standard threaded female ports found on pumps, manifolds, seacocks, and bulk-fluid tanks. The cast-in wrench flats allow secure gripping and rotation without risk of rounding hex heads, a practical advantage when working in confined engine rooms or below-deck spaces where clearance is limited. Weighing 1.1 lbs, this nipple is suitable for permanent installation in both gravity-fed and pressure-driven systems.

This fitting is specified for non-potable applications; C83600 bronze does not comply with NSF-61 standards and is not approved for municipal water systems or drinking-water service. Marine engineers, boat builders, and system integrators rely on GROCO bronze fittings for seawater cooling systems, fuel transfer lines, and hydraulic applications where material compatibility and corrosion resistance are non-negotiable. The 2-inch size accommodates higher flow rates typical of engine cooling, bilge, and fuel-tank deck fill systems.

GROCO is recognized within the marine and industrial sectors for manufacturing quality bronze and stainless-steel fittings that meet or exceed ASTM B62 standards for cast bronze. This nipple is a long-lead spare part worth stocking on vessels and in shore-based maintenance shops; replacement lead times for marine-grade bronze fittings often exceed standard procurement cycles, making advance inventory prudent for operational continuity.