Nibco 633 Copper Union – Sweat

High Demand Item – Frequently Reordered by Contractors

The Nibco 633 Copper Union – Sweat is a wrought copper union for Sweat x Sweat (solder both ends) connections. Used in copper piping systems for residential, commercial, and mechanical applications. Manufactured to ASME B16.22 dimensions.

Available in 1/2", 3/4", 1", 1-1/4", 2". Select size from the dropdown above.

Applications

• Residential and commercial plumbing systems
• HVAC and hydronic heating and cooling systems
• Domestic hot and cold water distribution
• Industrial and mechanical copper piping

Key Features

• Wrought copper construction
• Sweat x Sweat (solder both ends) connection(s)
• Dimensions per ASME B16.22
• Available in 1/2", 3/4", 1", 1-1/4", 2"

Frequently Asked Questions

What standard does this fitting conform to?

ASME B16.22 — wrought copper and copper alloy solder-joint pressure fittings.

What connection type?

Sweat x Sweat (solder both ends) — standard copper tube connection.

Is bulk pricing available?

Yes — contact us for contractor or volume pricing.

Why Contractors Choose This Product

• Nibco — a recognized name across the trade
• Wrought copper for consistent, reliable soldered joints
• ASME B16.22 dimensions — fits standard copper tube and fittings
• Stocked in all common sizes
• In stock and ready to ship from U.S. warehouses