Sioux Chief 633-312 3/4" FIP Swivel x 3/4" Copper Sweat No-Lead DZR Coupling, 12" Length

Sioux Chief 633-312 3/4" FIP Swivel x 3/4" Copper Sweat No-Lead DZR Coupling, 12" Length

The Sioux Chief 633-312 is a 3/4" FIP swivel x 3/4" copper sweat coupling built for water heater connections and general rough-in plumbing work. This 12" length fitting is machined from No-Lead (NL), dezincification-resistant (DZR) brass, giving it the corrosion resistance needed for long-term potable water service. One end terminates in a female iron pipe (FIP) swivel connection that threads onto a male fitting without turning the attached tubing, while the opposite end is sized for a standard solder/sweat joint to 3/4" copper tube. Manufactured in the United States and packaged 25 pieces per case, it is intended for plumbing contractors stocking rough-in and water heater hookup materials.

Key Features

• Trade Size: 3/4" FIP swivel inlet paired with a 3/4" copper sweat outlet, matched to standard 3/4" water heater supply and copper tube sizing.
• Overall Length: Manufactured in a 12" length to reach across typical water heater connection points and tight rough-in cavities.
• No-Lead DZR Brass Body: Formed from No-Lead (NL), dezincification-resistant (DZR) brass, a material selected to resist the zinc loss that can weaken standard brass fittings in aggressive water conditions.
• Swivel FIP End: The female iron pipe (FIP) swivel connection rotates freely on the fitting body, so it can be threaded fully onto a male connection without twisting or stressing the copper tube on the opposite end.
• Copper Sweat End: The opposite end is sized for a solder/sweat connection directly to 3/4" copper tube, allowing a standard torch-and-solder joint.
• Threading Note: Sioux Chief instructs installers not to use pipe dope on the FIP swivel threads, helping the swivel seat and turn correctly during installation.
• Domestic Manufacturing: Made in the United States.

Certifications & Compliance

• No-Lead (NL) Compliant Construction
• DZR (Dezincification-Resistant) Brass

Technical Specifications

• Product Type: Coupling
• Country of Origin: United States
• Packaging: 25 EA per case

Typical Applications

• Water Heater Rough-In Connections
• Copper Tube to Threaded Fitting Transitions
• Residential and Commercial Water Heater Installations
• Potable Water Supply Line Connections
• New Construction and Renovation Plumbing

Why Sioux Chief?

Sioux Chief builds this coupling from No-Lead, DZR-rated brass to withstand the demands of potable water rough-in work, and manufactures it in the United States. The FIP swivel end simplifies installation onto threaded connections without twisting the attached tubing, while the copper sweat end keeps the joint compatible with standard 3/4" copper tube, making this a dependable choice for water heater hookups and rough-in plumbing crews.