Brass Pipe Bushing 1" x 3/4" NPT | Marine Plumbing Reducer Fitting
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Brass Pipe Bushing 1" x 3/4" NPT — Marine Plumbing Reducer Fitting
A compact, reliable brass reducer bushing for marine plumbing systems. This 1" male NPT x 3/4" female NPT bushing steps down a 1" threaded port to accept a 3/4" fitting, hose barb, or valve — one of the most common size transitions in marine raw water, bilge, and freshwater plumbing runs.
Machined from solid brass, it resists corrosion in both freshwater and saltwater environments and forms a pressure-tight seal when used with marine-grade thread sealant. The NPT taper thread engages progressively as the fitting is tightened, eliminating the need for a separate gasket.
Key Features
- Size: 1" male NPT x 3/4" female NPT (reducer bushing)
- Material: Solid brass — corrosion-resistant in freshwater and saltwater
- NPT taper thread — pressure-tight seal without a separate gasket
- Suitable for bilge, raw water, freshwater, and general marine plumbing
- Use with marine-grade PTFE tape or pipe thread sealant for a leak-free connection
Best Use Case
Best suited for stepping down a 1" threaded port or fitting to a 3/4" connection in marine plumbing systems — common in raw water intake lines, bilge pump discharge plumbing, freshwater system connections, and engine cooling circuits. Always apply marine-grade PTFE tape or pipe thread sealant to NPT threads before assembly. Do not overtighten — NPT threads seal through taper engagement and excessive torque can crack brass fittings.
Parts Desk Insights
The 1" x 3/4" size is one of the most frequently requested brass bushing sizes — it covers a wide range of common plumbing transitions on production boats. When a customer needs this fitting, confirm whether they need a bushing (male-to-female, which this is) or a coupling (female-to-female) before ordering. Cross-sell with other sizes in the brass bushing range as needed: 1-1/4" x 3/4" Brass Bushing, 1-1/2" x 1-1/4" Brass Bushing, 2-1/2" x 2" Brass Bushing, and 3" x 2-1/2" Brass Bushing. For elbow fittings in the same plumbing run, see the Brass 90° Elbow 1" 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
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.