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NIBCO Sweat Fitting Adapter: 1/4 in CTS x 3/8 in Pipe, Cup x FNPT - Wrot Copper Tube Fittings
NIBCOWrot Copper Tube Fittings

NIBCO Sweat Fitting Adapter: 1/4 in CTS x 3/8 in Pipe, Cup x FNPT

SKU 3G-OTH-472500

Brand
NIBCO
Item
Sweat Fitting Adapter: 1/4 in CTS x 3/8 in Pipe, Cup x FNPT
Category
Wrot Copper Tube Fittings
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Technical Specifications

NIBCO
Manufacturer Part Number
603R 1/4x3/8
Type
Cup x FNPT, Wrot Copper
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NIBCO Products
3G Electric (S) Pte. Ltd. — Singapore

Frequently Asked Questions

What is a NIBCO sweat fitting adapter used for?

A NIBCO sweat fitting adapter connects copper tubing to threaded pipe in plumbing and HVAC systems. This 1/4 in CTS x 3/8 in Pipe cup x FNPT wrot copper adapter joins a sweat (solder) connection on one end to a female NPT thread on the other, enabling transitions between tube and pipe.

What are the specifications of the NIBCO 603R 1/4x3/8 adapter?

The NIBCO 603R 1/4x3/8 is a wrot copper sweat fitting adapter with a cup end for 1/4 in CTS copper tube and a female NPT thread for 3/8 in pipe. It is made of wrot copper for corrosion resistance and is used in potable water and hydronic heating systems.

Where to buy NIBCO sweat fitting adapters worldwide?

3G Electric supplies NIBCO sweat fitting adapters worldwide, handling full logistics and customs clearance. As a global industrial solutions provider, we source and deliver genuine NIBCO fittings like the 603R 1/4x3/8 to any location, ensuring compliance with international shipping requirements.

How to install a NIBCO sweat fitting adapter?

To install a NIBCO sweat fitting adapter, clean and flux the copper tube and cup end, then heat the joint evenly until solder melts into the gap. For the threaded side, apply pipe thread sealant and tighten to the female NPT connection. Always follow local plumbing codes and use lead-free solder for potable water.

Used in

Common applications for NIBCO
HVAC systems — NIBCO bronze ball valves (T58570UL series) for isolation and control in chilled water loops
Water treatment plants — NIBCO bronze gate valves (T29 series) for shut-off in filtration and distribution lines
Industrial burner systems — NIBCO brass ball valves (GB2A series) for fuel oil or gas supply lines
Chemical processing — NIBCO bronze ball valves with locking lever (T58570LL series) for safety-critical flow control
Steam systems — NIBCO bronze globe valves for throttling in low-pressure steam applications
General plumbing — NIBCO bronze ball valves (S58570 series) with sweat connections for copper piping in commercial buildings

NIBCO Products

3G Electric supplies NIBCO wrot copper tube fittings. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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