Cambridge 223509 Mini Split Lineset 1/4x1/2 in 15 Ft

Product Description

The CAMBRIDGE 223509 is a pre-cut mini split lineset designed to connect the indoor evaporator unit to the outdoor condensing unit in a ductless mini split system. This lineset features a 1/4-inch liquid line and a 1/2-inch suction line, with a total run length of 15 feet. It is supplied without communication wire and includes double flare nuts on both lines for a secure, leak-resistant connection. HVAC technicians working on residential and light-commercial ductless installations will find this lineset ready for field use straight out of the box.

This lineset is suited for residential ductless mini split installations where a 15-foot run from the indoor air handler to the outdoor unit is appropriate. The 1/4-inch by 1/2-inch line diameter combination covers a common range of single-zone mini split system capacities. This part supersedes the older part number 222818 and also cross-references as 408K0150B3B6L and B141212015, making it a direct drop-in for installations that previously used those identifiers.

Key Features

• 1/4-inch liquid line and 1/2-inch suction line for standard mini split applications
• 15-foot pre-cut length reduces field measuring and cutting time
• Double flare nuts included on both lines for a reliable, leak-resistant seal
• Supplied without communication wire — compatible with systems using separate low-voltage wiring
• Supersedes part number 222818 for direct replacement use
• Cross-references: 408K0150B3B6L, B141212015

Compatibility

This lineset replaces CAMBRIDGE part number 222818 and cross-references as 408K0150B3B6L and B141212015. Verify line diameters, run length, and flare nut specifications against the equipment manufacturer requirements before installation.

Installation Notes

Installation should be performed by a licensed HVAC technician with EPA Section 608 certification, as this work involves refrigerant-handling equipment. Power down both the indoor and outdoor units at the disconnect before making any line connections. Ensure all flare connections are seated and torqued using a calibrated torque wrench to the equipment manufacturer specifications — do not overtighten. Leak-test the completed lineset with dry nitrogen before evacuating and charging the system.