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NIBCO 3 in CTS Cast Copper Sweat Union, Cup x FTG - Cast Copper & Bronze Tube Fittings
NIBCOCast Copper & Bronze Tube Fittings

NIBCO 3 in CTS Cast Copper Sweat Union, Cup x FTG

NIBCO Cast Copper & Bronze Tube Fittings. Specifications: Type: Cup x FTG, Cast Copper.

SKU 3G-OTH-469277

Also listed as: 7333 · 733-3

Brand
NIBCO
Item
3 in CTS Cast Copper Sweat Union, Cup x FTG
Category
Cast Copper & Bronze Tube Fittings
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Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
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Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

NIBCO
Manufacturer Part Number
733 3
Type
Cup x FTG, Cast Copper

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NIBCO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

NIBCO Cast Copper & Bronze Tube Fittings. Specifications: Type: Cup x FTG, Cast Copper.

Frequently Asked Questions

What is a NIBCO sweat fitting union used for?

A NIBCO sweat fitting union connects two copper pipes in plumbing, HVAC, and industrial systems, allowing easy disassembly for maintenance. This 3-inch CTS cast copper union uses a cup x FTG design for soldered joints, ensuring leak-free performance in water, gas, and steam lines.

What are the specifications of the NIBCO 733 3 union?

The NIBCO 733 3 is a 3-inch CTS cast copper sweat fitting union with cup x FTG ends. It is made from cast copper for durability in high-temperature and pressure applications. The manufacturer part number is 733 3, and it is designed for soldered connections in copper tubing systems.

Where to buy a NIBCO 733 3 union worldwide?

3G Electric supplies the NIBCO 733 3 union worldwide, handling full logistics and customs clearance for global delivery. As a sourcing partner, we provide this cast copper fitting for industrial plumbing and HVAC projects. Contact us for availability and lead times to your location.

How to install a NIBCO sweat fitting union?

To install a NIBCO sweat fitting union, clean and flux the copper pipe ends and the cup x FTG surfaces. Heat the joint evenly with a torch until solder melts into the gap, then allow it to cool. Ensure the union nut is tightened after soldering for a secure, leak-free connection.

Used in

Common applications for NIBCO
HVAC systems — NIBCO bronze ball valves (T58570UL series) for isolation and control in chilled water loops
Water treatment plants — NIBCO bronze gate valves (T29 series) for shut-off in filtration and distribution lines
Industrial burner systems — NIBCO brass ball valves (GB2A series) for fuel oil or gas supply lines
Chemical processing — NIBCO bronze ball valves with locking lever (T58570LL series) for safety-critical flow control
Steam systems — NIBCO bronze globe valves for throttling in low-pressure steam applications
General plumbing — NIBCO bronze ball valves (S58570 series) with sweat connections for copper piping in commercial buildings

NIBCO Products

3G Electric supplies NIBCO cast copper & bronze tube fittings. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
Wrot copper union with cup x cup ends for joining 3/4 inch CTS copper tubing via sweat-soldering. Used in plumbing, hydronic heating, and industrial piping systems for leak-free connections
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Wrot copper union with cup x cup ends for joining 3/4 inch CTS copper tubing via sweat-soldering. Used in plumbing, hydronic heating, and industrial piping systems for leak-free connections
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This NIBCO sweat fitting union is made from low-lead cast bronze and features a Cup x FTG connection type. It is designed for joining copper tube in low-lead bronze systems, allowing easy disassembly for maintenance. Suitable for use in potable water and other plumbing applications requiring reliable joints
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This NIBCO sweat fitting union is made from low-lead cast bronze and features a Cup x FTG connection type. It is designed for joining copper tube in low-lead bronze systems, allowing easy disassembly for maintenance. Suitable for use in potable water and other plumbing applications requiring reliable joints
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This bulkhead tee is made from low-lead cast copper and bronze for corrosion resistance. It features a cup x cup x FNPT configuration with 1/2 in CTS copper sweat ends and a 3/4 in FNPT threaded outlet. Used in plumbing and HVAC systems to connect copper tubing and allow a branch line to pass through a tank or wall
Low-lead cast bronze sweat fitting elbow with 1/2 in CTS cup x 1/2 in CTS FTG connections. Used to join copper tubing to male threaded fittings in potable water and hydronic heating systems
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Low-lead cast bronze sweat fitting elbow with 1/2 in CTS cup x 1/2 in CTS FTG connections. Used to join copper tubing to male threaded fittings in potable water and hydronic heating systems
Wrot copper sweat fitting coupling with cup x FTG configuration. Connects 3/4 in CTS to 1/4 in CTS copper tubing. Used for soldered joints in plumbing and HVAC systems to transition between different tube sizes
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Wrot copper sweat fitting coupling with cup x FTG configuration. Connects 3/4 in CTS to 1/4 in CTS copper tubing. Used for soldered joints in plumbing and HVAC systems to transition between different tube sizes

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