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Straight copper coupling with cup and FNPT ends

Nibco, Inc.

Nibco, Inc. 903 2 Straight Copper Coupling Cup 2 in FNPT 2 in

SKU CH-1YZ4-61Z10

Straight copper adapter joining a 2 in cup sweat connection to a 2 in FNPT thread for air or potable water systems

  • Sweat-to-thread transition joins copper tube to FNPT pipe
  • Wrought C12200 copper resists corrosion in potable water systems
  • Rated for 5 psi at up to 400 °F service temperature
  • Meets ASME B16.29, ASTM B75 and ISO 9001 standards
  • Operates reliably from 20 °F to 400 °F ambient range

Straight Copper Adapter for Potable Water

This NIBCO 903 sweat fitting adapter joins a 2-inch copper tube to a 2-inch FNPT thread in a straight configuration. It is intended for installers working on potable water or compressed air systems where a reliable copper-to-threaded transition is required. The wrought copper body meets ASME B16.29 and ASTM B75 standards for material quality.

Pressure and Temperature Limits for Continuous

The fitting is rated for a maximum operating pressure of 5 psi and a maximum operating temperature of 400 degrees Fahrenheit. The minimum operating temperature is 20 degrees Fahrenheit. These limits apply to sustained service conditions rather than short-term peaks, so system designers must verify that normal operating parameters stay within this range.

Verify Tube Size and Thread Compatibility Before

Confirm that the existing copper tube has a 2-inch nominal size and a 2 1/8-inch outer diameter to match the cup end. Ensure the mating component provides a 2-inch FNPT thread for the other side. The fitting is manufactured to ISO 9001 quality standards using C12200 grade copper.

How it compares

Measured against everything we stock in Hose Fittings, Adapters & Clamps, at today’s prices. Recalculated every night.

Price $14.99
Cheaper than about 58% of the 2,955 comparable items (median $17.99).

Specifications

Product
Brand nameNibco

Questions about this item

How much heat can the Wrot Copper body of the 903 handle before it reaches its limit?

The fitting is rated for a maximum operating temperature of 400 degrees Fahrenheit and a minimum of 20 degrees Fahrenheit.

What pipe size and thread type must the existing plumbing have for the FNPT side to connect?

The FNPT side requires a 2 inch pipe with female national pipe thread for a proper seal.

Will the Cup end accept the 2 1/8 inch outer diameter copper tube I already have installed?

Yes, the Cup end is sized for a 2 inch copper tube size which corresponds to a 2 1/8 inch outer diameter.

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