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The flush bushing features a male solder end and female NPT thread. The fitting provides a means of reducing the size of a line as well as adapting from a solder connection to a threaded connection. Please refer to NIBCO technical data sheets and catalogs for engineering and installation information. In addition to its inherent qualities of beauty, durability and low maintenance, copper's reusability makes it an ideal application in sustainable projects. NIBCO® copper fittings are manufactured in an ISO 9001 certified facility, and backed by a 50-year limited warranty. Because of its longstanding reputation for innovation and precision in design and manufacturing, NIBCO is the preferred brand in the industry.
Copper Fittings Installation Instructions
- Dezincification resistant
- Use in U.S. drinking water applications is prohibited after January 3, 2014
- ASTM B584 Alloy C84400
- Material and workmanship per ASME B16.18
Copper Fittings Installation Instructions
Manufacturer Resources
Product Specs
- All Basic Material:
- Bronze
- Classification:
- Solder Pressure Bushings
- End Connection:
- Threaded
- Metal End Connection Type:
- Ftg x F
- Product Group:
- Fitting
- Product Type:
- Solder Pressure Bushings
- System Use:
- Commercial Plumbing, Fire Protection, Heating, HVAC, Industrial, Irrigation, Residential Plumbing
- Type of Bushing:
- Flush;Reducing
- Product Subgroup:
- Bushing
- Department:
- Plumbing
Nibco B179350 – Frequently Asked Questions
1) How does the Nibco 718-3 flush bushing connect on each end?
It is a Ftg x F bushing: the male (fitting) end solders into the cup of a copper fitting, and the other end is female NPT thread. So it takes you from a soldered copper line down to a threaded connection in one part, and reduces the line size at the same time.
2) Can I use the Nibco 718-3 bronze flush bushing on potable drinking water?
No. Use in U.S. drinking water applications is prohibited after January 3, 2014. This is a C84400 bronze alloy bushing, so keep it on non-potable service: heating, HVAC, industrial, irrigation, and fire protection lines. For potable water you need a lead-free rated fitting.
3) What size reductions does the Nibco 718-3 flush bushing come in?
Three size combinations: 1 inch x 1/2 inch (B179350), 1-1/4 inch x 3/4 inch (B179400), and 1-1/2 inch x 1 inch (B179450). The first number is the copper line size the fitting end solders into, the second is the female NPT thread size.
4) Why is it called a flush bushing instead of a regular reducing bushing?
The fitting end is sized to slip inside the cup of the mating copper fitting so it seats flush rather than standing proud, which keeps it from adding length to the run. Nibco classifies it as both a flush and reducing bushing, so it does the size reduction and the solder-to-thread change in one piece instead of stacking a reducer and an adapter.
5) Will the Nibco 718-3 bushing hold up in a closed-loop hydronic system?
It is dezincification resistant cast bronze to ASTM B584 Alloy C84400, with material and workmanship per ASME B16.18, and Nibco lists it for heating and HVAC service along with commercial and industrial piping. That is the normal home for a bronze bushing like this, since it is off limits for potable water.
6) Do I need dope or tape on the threaded side of this Nibco bushing?
The female side is NPT, a tapered pipe thread, so it seals on the threads and needs a thread sealant or PTFE tape. The other end is a solder joint. Practical sequence: make up the threaded connection before you sweat the fitting end, or let the joint cool first, so you are not heating sealant or a plastic-bodied mating part.
7) Is this bushing suitable for a fire protection line?
Yes, fire protection is one of the listed system uses for this cast bronze Nibco flush bushing, alongside commercial plumbing, industrial, irrigation, HVAC and heating. Confirm the reduction you need is one of the three offered, since the largest goes 1-1/2 inch down to 1 inch NPT.
How fast can I get the Nibco B179350 delivered?
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Nibco B179350 come with a warranty?
Absolutely. The Nibco B179350 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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