NIBCO Sweat Fitting Adapter: 1/4 in CTS x 3/8 in Pipe, Cup x FNPT
SKU 3G-OTH-472500
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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.
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Common applications for NIBCONIBCO 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.









