NIBCO Sweat Fitting Adapter: 1 in CTS x 3/4 in Pipe, Cup x FNPT, Wrot Copper (MPN 603R 1x3/4)
SKU 3G-OTH-472228
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Frequently Asked Questions
What is a NIBCO sweat fitting adapter used for?
A NIBCO sweat fitting adapter joins copper tubing to threaded pipe connections. The 1 in CTS cup end solders onto copper tube, while the 3/4 in FNPT end accepts male threaded pipe, making it ideal for plumbing transitions in water supply and HVAC systems.
What are the specifications of the NIBCO 603R 1x3/4 adapter?
The NIBCO 603R 1x3/4 is a wrot copper sweat fitting adapter with a 1 in CTS cup x 3/4 in FNPT connection. It is designed for soldering onto copper tube on one side and threading onto male pipe on the other, suitable for potable water and hydronic heating applications.
Where to buy NIBCO sweat fitting adapters worldwide?
3G Electric supplies NIBCO sweat fitting adapters worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us to order the NIBCO 603R 1x3/4 or other wrot copper fittings for your project.
How to install a NIBCO sweat fitting adapter?
To install a NIBCO sweat fitting adapter, clean and flux the copper tube end and the cup interior. Slide the tube into the cup, heat evenly with a torch until solder melts into the joint, then allow to cool. For the FNPT end, apply thread sealant and tighten onto male pipe.
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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.









