

Ships same day if ordered by 12 pm
Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Secure Payments
Easy Returns
Expert Advice
Fast Shipping
The MUELLER STREAMLINE FTG00170 is a wrot copper reducer fitting designed to connect copper tubing of two different sizes in a sweat (soldered) joint assembly. It transitions from a 3/8-inch connection to a 1/4-inch connection, making it a compact and reliable solution for reducing line size in residential and commercial copper piping systems. At 0.01 pounds actual weight and measuring 1.5 inches in length, the fitting is well-suited for tight spaces. Licensed plumbers and HVAC technicians regularly install this type of fitting in potable water, refrigeration, and HVAC applications where sweat joints are specified. Compliance with ASME and NSF standards confirms the fitting meets recognized performance and safety requirements for copper fittings.
This reducer fitting is used wherever a copper line must step down from 3/8-inch to 1/4-inch tubing, including domestic water supply lines, refrigeration suction and liquid lines, and HVAC equipment connections. Its wrot copper construction provides the consistent grain structure and workability that technicians depend on when making clean, leak-free soldered joints. The fitting is appropriate for both new construction and retrofit installations in residential and light commercial environments.
Designed as an OEM-style replacement and standard-use sweat fitting compatible with 3/8-inch x 1/4-inch copper tubing systems in plumbing and HVAC applications.
Installation should be performed by a licensed plumber or HVAC technician familiar with sweat-soldering copper fittings. Shut off the water or refrigerant supply and fully depressurize and dry the line before soldering. Use appropriate flux and lead-free solder where required by local plumbing codes; potable water applications typically require lead-free solder per IPC guidelines. Allow the joint to cool completely before restoring system pressure.
Thanks for subscribing!
This email has been registered!