Mueller Streamline LS-783830P-12 Line Set 30 Ft 7/8x3/8

Product Description

The MUELLER STREAMLINE LS-783830P-12 is a pre-insulated copper refrigeration line set designed for residential and light commercial HVAC installations. It consists of two refrigerant-grade copper lines — a 7/8 inch OD suction line and a 3/8 inch OD liquid line — supplied at 30 feet in length. Factory-applied 3/4 inch closed-cell foam insulation covers the suction line to limit heat gain and prevent condensation buildup during operation. HVAC technicians use this line set to connect a split-system condenser or heat pump to its matched air handler or evaporator coil.

This line set is suited for residential split-system air conditioning and heat pump installations where a thicker insulation wall is preferred. The 3/4 inch insulation makes it a practical choice for exposed routing through unconditioned spaces such as attics, crawlspaces, or exterior walls, where ambient heat gain would reduce system efficiency if a thinner insulation were used. The 30 foot length covers most standard single-story residential installations without field splicing.

Key Features

• 7/8 inch OD suction line and 3/8 inch OD liquid line in a single pre-paired set
• 30 foot length suitable for most single-story residential split-system runs
• 3/4 inch factory-applied closed-cell foam insulation on the suction line for reduced heat transfer
• Refrigerant-grade copper construction compatible with common HFC and HCFC refrigerants
• Thicker insulation wall reduces condensation risk in exposed or unconditioned routing paths

Compatibility

Designed as an OEM-style replacement or new-installation line set for residential and light commercial split-system air conditioners and heat pumps requiring a 7/8 inch suction line and 3/8 inch liquid line configuration.

Installation Notes

Line sets are installed by licensed HVAC technicians in accordance with local mechanical codes and refrigerant handling regulations under EPA Section 608. Shut down and recover all refrigerant from any existing system before disconnecting or replacing a line set. Braze connections using nitrogen purge to prevent internal oxidation, and pressure-test the completed line set before pulling a vacuum and recharging the system. Secure the line set at regular intervals to prevent vibration-related wear on the insulation and tubing.

Technical Specifications

• Suction Line OD: 7/8 inches
• Liquid Line OD: 3/8 inches
• Length: 30 feet
• Insulation Thickness: 3/4 inches
• Tubing Material: Copper

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: LS-783830P-12