Line sets are required when installing a Mr. Cool Mini Split System. Mr. Cool Line Sets are available in 16' and 25' lengths. Sometimes an installation may require a longer length. By adding a coupler you can connect two lines together to extend the length of your line set. Up to 3 line sets can be connected together, giving you the possibility of a 75 foot length. Keep in mind that the total length for any Mr. Cool multi-zone system is a 75' maximum per zone. If you are connecting three lines, you will need 2 couplers and 75 ft. of communication wire!
The DIYCOUPLER-1412K75C includes DIYCOUPLER-14 and DIYCOUPLER-12 as well as 75 feet of MC5 Pro Cable for an unbroken run from your indoor unit to your outdoor unit. Simply disconnect the 25 foot length of wire or cable pre-attached to your indoor unit and replace it with the new 75 foot Pro Cable. It is for use with the 9,000, 12,000 or 18,000 BTU indoor wall units. If you have excess cable, it will need to be coiled - it cannot be cut.