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Small straight copper union sweat fitting with cup ends

Nibco, Inc.

Nibco, Inc. 733 1/4" Copper Union Sweat Fitting

SKU CH-Z1S0-TNWWH MPN 733

A 1/4-inch copper union sweat fitting for air and non-potable water lines, rated to 912 psi at 100 Degrees F and 400 Degrees F

  • Product typeDrain Components
  • Main materialHAWA
  • Rated for 912 psi at 100°F ensuring high-pressure reliability
  • Withstands temperatures up to 400°F for demanding thermal applications
  • Cast copper construction provides corrosion-resistant durability
  • Sweat cup connections on both ends simplify copper tube installation
  • Straight union design allows easy in-line pipe joining

Copper Union for 1/4-Inch Tube

This straight union joins two 1/4-inch nominal copper tubes using sweat connections on both ends. It suits installers who need a permanent, leak-resistant joint in air or non-potable water lines.

Cast Copper Build Handles Pressure

The cast copper body withstands up to 912 psi at 100 degrees F and continuous temperatures up to 400 degrees F. No additional sealants or mechanical fasteners are required once the sweat joints are properly brazed.

Steady Strength Under Sustained Heat

Rated for prolonged exposure at 400 degrees F, the fitting maintains its pressure rating without degradation during extended thermal cycles. It is not intended for potable water systems or applications exceeding the stated pressure and temperature limits.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $14.99
Cheaper than about 74% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameNibco
Model name733 1/4
Product typeDrain Components
Size & build
Main materialHAWA

Questions about this item

What maximum operating pressure does the 1/4-inch copper union handle at 100 Degrees F?

The fitting is rated for 912 psi at 100 Degrees F, so that is the pressure limit you will reach first under sustained use.

How much heat can the cast copper union take during continuous operation?

It is rated to 400 Degrees F, so the material and joint will withstand that temperature all day without degrading.

What tube size must the existing copper lines be for this union to sweat on correctly?

Both ends accept 1/4-inch nominal copper tube with a 3/8-inch outer diameter, so your supply lines need to match that size.

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