Parker fn.lsin143812050 Twingel Line Set 50 Ft

Product Description

The PARKER fn.lsin143812050 is a TwinGel preinsulated copper line set designed for refrigerant piping in ductless mini-split, VRF, heat pump, and unitary HVAC systems. The set includes a 1/4-inch liquid line and a 3/8-inch suction line mechanically bonded together in a single assembly, spanning 50 feet in length, with flare nuts included. The suction line is insulated to a 1/2-inch wall thickness. The dual-line construction reduces layout time and keeps refrigerant lines organized during rough-in. Licensed HVAC technicians installing split-system equipment are the primary users of this product.

This line set is suited for residential and light commercial applications where ductless mini-splits, heat pumps, VRF systems, or other unitary equipment require a pre-paired refrigerant piping solution. The mechanically attached suction and liquid lines simplify routing through walls, attics, and chases. The line set is compatible with R-410A and other high-pressure refrigerant systems. Foot markings printed on the insulation allow technicians to track length accurately during installation, supporting correct initial refrigerant charge calculations and minimizing copper waste.

Key Features

• Suction and liquid lines mechanically joined for faster, cleaner installation
• UL723 Classified R39562 (ASTM E84 25/50) flame and smoke rating
• White polyethylene outer jacket protects foam insulation from tearing during pull-through
• UL Performance Verified for UV resistance, tested for a minimum of 5 years of UV exposure
• Rated for use with R-410A and other high-pressure refrigerant gases
• Foot markings on insulation for accurate length tracking and charge management
• Paintable insulation surface allows color-matching to building exteriors or interior finishes

Compatibility

Designed for use with ductless mini-split, VRF, heat pump, and unitary HVAC systems requiring a 1/4-inch liquid line and 3/8-inch suction line configuration with R-410A or other high-pressure refrigerants.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with refrigerant piping and applicable mechanical codes. Recover and isolate refrigerant from any active system before making line set connections. Flare nuts are included; use a calibrated flaring tool and inspect each flare for cracks or deformation before torquing fittings. Do not bend the line set below its minimum bend radius, and avoid kinking the copper tubing during routing.

Technical Specifications

• Liquid Line Diameter: 1/4 inch
• Suction Line Diameter: 3/8 inch
• Insulation Wall Thickness: 1/2 inch
• Length: 50 feet
• Refrigerant Compatibility: R-410A and high-pressure refrigerant applications
• Outer Jacket Material: White polyethylene
• UV Resistance: UL Performance Verified, minimum 5 years
• Flame and Smoke Rating: UL723 Classified R39562 (ASTM E84 25/50)
• Included Hardware: Flare nuts
• Unit of Measure: Each

Standard Information

• Brand: PARKER
• Manufacturer Part Number: fn.lsin143812050