We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Straight copper coupling, 3/8 inch sweat fitting, wrot copper finish

Nibco, Inc.

Nibco, Inc. 600DS 3/8 in Straight Copper Coupling

SKU CH-5C6W-RSXDY

Connects 3/8 in copper tubes in a straight line for air, gases or potable water up to 623 psi at 200 °F

  • Straight coupling joins 3/8 in copper tube ends
  • Wrot copper construction resists corrosion in potable water systems
  • Rated for 623 psi at 200 °F operating conditions
  • Withstands temperatures up to 400 °F for hot water lines
  • Sweat fitting design creates permanent leak-free joints

3/8-inch Straight Copper Coupling

The Nibco 600DS is a sweat fitting coupling made from wrought copper. It joins two 3/8-inch copper tubes with cup connections on both ends. The fitting suits air, gas and potable water lines in residential or light commercial plumbing.

For copper pipe installers only

Plumbers who need a permanent, leak-free joint on 3/8-inch copper tube will find this coupling fits the task. It is not for threaded, press-fit or push-to-connect systems, nor for pipes of a different diameter or material.

Rated for 623 psi at 200 °F

The coupling handles pressures up to 623 psi at 200 degrees Fahrenheit and temperatures up to 400 degrees Fahrenheit. It provides ample headroom for typical domestic hot and cold water services, but exceeds the needs of low-pressure air lines.

How it compares

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

Price $1.56
Cheaper than about 96% of the 2,955 comparable items (median $17.99).

Specifications

Product
Brand nameNIBCO

Questions about this item

What copper tube size must I already have for the 3/8 in straight coupling to connect?

Both ends accept 3/8 in copper tube size, so you need two lengths of 3/8 in copper tubing to join with this fitting.

Will the 623 psi pressure rating at 200 °F still hold if I keep older copper pipe rated for lower pressure?

The coupling itself is rated to 623 psi at 200 °F, but the overall system pressure limit will be set by the lowest-rated component you retain.

After soldering, how can I confirm the straight coupling is sealed and functioning?

Pressurise the line with air or water up to the design pressure and inspect the two sweat joints for any leakage.

More in Hose Fittings, Adapters & Clamps

Similar items