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Bronze copper union, 3/4 inch cup to MNPT, straight shape

Value Brand

Value Brand 24W565 Copper Union 3/4 in Cup MNPT

SKU CH-ZX7C-920HM

Cast copper sweat-union fitting joins 3/4 in copper tube to 3/4 in MNPT, rated 582 psi at 100 °F and 400 °F max temperature

  • Product colorBronze
  • Product typePipes, Valves & Fittings
  • Sweat-fitting union simplifies copper tubing connections
  • 582 psi rating at 100 °F ensures reliable pressure handling
  • Withstands 400 °F for high-temperature applications
  • Cast copper construction resists corrosion in plumbing systems
  • Straight union design joins 3/4 in tube to 3/4 in MNPT

Copper Sweat Union for 3/4 in Tubing

This Zoro Select copper union joins 3/4 in copper tubing to a 3/4 in male NPT thread. The straight union uses a sweat cup on one side and a threaded connection on the other. It is built for plumbing and tubing systems in residential or commercial settings. The cast copper body provides corrosion resistance and durability.

Cast Copper Body Rated for 582 psi

The fitting is manufactured from cast copper with a bronze finish. It withstands a maximum operating pressure of 582 psi at 100 degrees F and a maximum operating temperature of 400 degrees F. The sweat cup accepts 3/4 in copper tube with a 7/8 in outer diameter. The MNPT end threads directly into female NPT fittings without adapters.

3/4 in Copper Tube to MNPT Transition

This union specifically connects 3/4 in copper tube size to a 3/4 in male pipe thread. It is not a copper-to-copper coupling and does not join dissimilar tube sizes. Installers needing a press, push-fit, or compression connection will require a different fitting type. The straight shape suits in-line installations only.

How it compares

Measured against everything we stock in Bath Accessories & Soap Dispensers, at today’s prices. Recalculated every night.

Price $15.99
Cheaper than about 78% of the 1,499 comparable items (median $39.99).

Specifications

Product
Brand nameZORO SELECT
Product colorBronze
Product typePipes, Valves & Fittings

Questions about this item

What pressure does the 582 psi copper union actually hold in practice?

It is rated for 582 psi at 100 degrees F, so that is the maximum pressure you can expect under normal hot‑water conditions.

What pipe and tube sizes must match for this 3/4 in cup and MNPT union to fit?

Side A takes 3/4 in copper tube with a 7/8 in outer diameter, while Side B threads onto 3/4 in MNPT pipe.

How is the sweat cup end installed, and what step do people often miss?

Clean the tube, apply flux, slide the union on, then heat evenly until solder flows; the step many skip is heating the fitting body, not just the tube, so the solder pulls into the joint.

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