NIBCO 1 in. Sweat X 3/4 in. D Sweat Copper Flush Bushing is a precise, brass-copper reducing fitting engineered to transition a 1" copper sweat line down to 3/4" copper with a flush, unobtrusive profile. Crafted from lead-free copper, this rugged flush bushing is designed for durability in potable-water systems and stands up to underground installations, giving you a reliable, long-lasting connection where space is tight and flow matters.
Overview
Designed for copper piping projects that demand a clean, seamless step-down, this NIBCO flush bushing reduces from 1" to 3/4" with both ends in sweat connections. Its compact, flush-end design minimizes obstruction inside fittings and assemblies, making it ideal for tight spaces and buried installations where clean transitions are essential.
Key specifications
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Material: Copper, lead-free for potable-water safety
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End 1: 1" diameter, Sweat
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End 2: 3/4" diameter, Sweat
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Type: Flush reducing bushing (1" x 3/4" Sweat)
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Packaging: Bagged, 1 per package
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Underground rated: Yes, suitable for buried installations
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NSF listing: Yes (potable water certified)
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Maximum working pressure: 494 psi
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Maximum working temperature: 400°F
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Compatible pipe material: Copper
Why this flush bushing stands out
Unlike generic reducers, this NIBCO bushing is purpose-built for copper systems with a flush, soldered connection. The lead-free copper construction delivers dependable corrosion resistance and a clean flow path, while the underground-rated capability provides peace of mind for exterior or buried runs. NSF-listed status confirms suitability for drinking water, making it a solid choice for residential and light commercial projects.
Practical use cases
- Step down a 1" copper water line to 3/4" for fixtures, appliances, or sectioned runs without adding bulky fittings.
- Install in tight crawlspaces or behind walls where space is at a premium and flush connections reduce snag hazards.
- Outdoor or underground piping runs where durability and long-term reliability are essential.
Installation tips
For a reliable, lasting joint, follow standard copper sweating best practices: thoroughly clean and deburr pipe ends, apply an appropriate flux, and heat evenly around the joint before applying solder. Ensure the bushing remains properly aligned during assembly, then allow the joint to cool undisturbed. Check for leaks after the joint has fully cooled and pressurized testing is completed.
With the NIBCO 1 in. Sweat X 3/4 in. D Sweat Copper Flush Bushing, you get a precise, durable, code-compliant solution that simplifies copper reduction while preserving flow and integrity in your piping system.
