Mueller Streamline FTG00858 Copper Reducer 1-1/8 Ftg X 5/8 C

Product Description

The MUELLER STREAMLINE FTG00858 is a wrot copper reducer fitting designed for sweat-solder copper piping systems. It transitions from a 1-1/8 inch fitting (FTG) end to a 5/8 inch copper (C) end using a female solder inlet and male solder outlet connection. Wrot copper construction delivers the strength, corrosion resistance, and solderability that plumbers and HVAC technicians require in refrigerant, hydronic, and domestic water applications. At 1 inch in length, this compact fitting integrates cleanly into tight spaces without adding unnecessary run length to the assembly.

This reducer is suited for residential and light commercial installations where copper tubing requires a transition between two different pipe sizes. Typical applications include refrigerant line sets, chilled water piping, domestic hot and cold water distribution, and hydronic heating loops. Plumbers and HVAC technicians reach for this fitting when connecting dissimilar-diameter copper lines with a flame-soldered joint.

Key Features

• Wrot copper construction for high-integrity solder joints and long service life
• Female solder (FTG) x male solder (C) connection style for in-line reducer installations
• 1-1/8 inch to 5/8 inch transition in a 1 inch overall length
• Lightweight at 0.15 pounds, minimizing load on copper line assemblies
• Compatible with standard 95/5 or 50/50 solder and lead-free solder alloys per plumbing code requirements

Compatibility

Designed as an OEM-style replacement and general-use reducer for copper sweat piping systems requiring a 1-1/8 inch FTG to 5/8 inch C transition.

Installation Notes

Installation should be performed by a licensed plumber or HVAC technician following applicable local plumbing codes and ASTM B88 copper tube standards. Shut off and depressurize the system and drain standing water from the line before cutting and fitting. Clean and flux all mating surfaces before applying heat; overflushing or overheating wrot copper fittings can compromise joint integrity. Reference IPC or IFGC guidelines for pressure testing requirements after soldering.

Technical Specifications

• Material: Wrot Copper
• Connection Type: Female Solder (FTG) x Male Solder (C)
• Inlet Size: 1-1/8 inches (FTG)
• Outlet Size: 5/8 inch (C)
• Actual Length: 1 inch
• Shipping Weight: 0.15 pounds
• Shipping Dimensions: 1.0 x 1.0 x 2.0 inches

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: FTG00858