Bronze fittings
Solder Joint Bronze Fittings
Cup-type bronze fittings for soldered connections to copper tube.
Overview
Solder-joint (sweat) fittings join copper or compatible tube using a low-melting solder that flows into the clearance between tube and fitting socket by capillary action. Solder fillers melt below roughly 450 °C (840 °F), which distinguishes soldering from brazing.
Solder joints are widely used in plumbing, heating and low-temperature fluid systems. Joint strength and service temperature are lower than for brazed joints.
Representative bronze fitting photography. Actual style, connection details and dimensions follow your specification.
Connection geometry
Solder-joint fittings have a cup sized to the tube outside diameter. Cup depth and clearance control the strength of the soldered joint.
Soldering versus brazing
Soldering and brazing both use capillary flow, but brazing uses higher-melting filler metals and produces stronger joints with higher service temperature. Do not substitute one for the other without checking the design and applicable codes.
Suitable applications
Common settings include potable and non-potable water (where permitted by regulation), heating and general low-temperature fluid lines. Lead-restricted systems require lead-free fittings and fillers.
Material and solder compatibility
Cast bronze fittings such as C83600 are routinely soldered. Lead-free systems must match both the fitting alloy and the solder composition to the applicable regulation.
- C83600 / C84400 – general fittings
- C89833 – lead-free option (verify compliance)
Installation considerations
Clean tube ends and sockets, apply flux, heat evenly and let joints cool undisturbed. Follow the installer’s procedure and applicable codes.
Related materials and products
Not every grade is available in every fitting configuration; confirm availability for your size and fitting type.
C83600 Bronze Pipe FittingsThe standard 85-5-5-5 cast alloy for general-purpose bronze pipe fittings, valves and plumbing components.View details →C84400 Bronze Pipe FittingsAn economical, highly machinable cast alloy (about 81-3-7-9) for general-purpose fittings, valves and plumbing hardware.View details →
C89833 Lead-Free Bronze FittingsA lead-free cast copper alloy considered for fittings, flanges and valve parts where lead content in wetted components is restricted.View details → Also see: Bronze Fittings overview · Bronze Flanges · Grade Directory
Frequently asked questions
Can I use lead-containing fittings for drinking water?
Regulations vary; many regions restrict lead in potable-water wetted parts. Verify against your local requirement.
Is a soldered joint as strong as a brazed joint?
Generally not. Brazed joints tolerate higher temperature and load; the choice depends on the system design.
Which configurations are available?
Confirmed per inquiry – send your size, tube OD and quantity.
Need solder joint bronze fittings?
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