Brass Pipe Bushing 2-1/2" x 2" NPT | Marine Plumbing Reducer Fitting
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Brass Pipe Bushing 2-1/2" x 2" NPT — Marine Plumbing Reducer Fitting
A heavy-duty brass reducer bushing for marine plumbing systems. This 2-1/2" male NPT x 2" female NPT bushing allows you to connect a 2" female-threaded fitting or hose barb into a 2-1/2" male-threaded port — a common requirement when adapting between different pipe sizes in bilge, raw water, exhaust, or through-hull plumbing runs.
Machined from solid brass, this bushing resists corrosion in both freshwater and saltwater environments and provides a leak-free threaded connection when properly sealed with marine-grade thread sealant. The NPT (National Pipe Taper) thread form creates a pressure-tight seal as the fitting is tightened.
Key Features
- Size: 2-1/2" male NPT x 2" female NPT (reducer bushing)
- Material: Solid brass — corrosion-resistant in freshwater and saltwater
- NPT thread form — tapered threads for a pressure-tight seal
- Suitable for bilge, raw water, exhaust, and general marine plumbing applications
- Use with marine-grade thread sealant (PTFE tape or pipe dope) for a leak-free connection
Best Use Case
Best suited for adapting a 2-1/2" threaded port or fitting down to a 2" connection in marine plumbing systems — common in bilge pump discharge lines, raw water intake plumbing, exhaust systems, and through-hull fitting installations. Always use a marine-grade thread sealant on NPT connections. Do not overtighten — NPT threads seal through taper engagement and excessive torque can crack brass fittings.
Parts Desk Insights
Brass reducer bushings are a frequent special-order item for customers doing plumbing repairs or upgrades on older vessels where non-standard pipe sizes were used. When a customer needs this size, confirm whether they need male-to-female (bushing) or female-to-female (coupling) configuration before ordering. Cross-sell with other brass fittings in the same plumbing run — see the full range of brass bushings available: 1-1/4" x 3/4" Brass Bushing, 1-1/2" x 1-1/4" Brass Bushing, 1" x 3/4" Brass Bushing, and 3" x 2-1/2" Brass Bushing. For 90° elbow fittings, see the Brass 90° Elbow 1" NPT and Brass 90° Elbow 1-1/2" NPT.
Related Brass Plumbing Fittings
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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