We’ve been providing home comfort solutions for over 45 years!
Launched in June of 2010, ExpressOverstock.com was developed from our experience of over 45 years as an HVAC contractor. We have been buying and selling new and unused overstocked and surplus inventories since 1992—shipping all over the US.
We continue to provide premium-branded HVAC systems, single component products and equipment at the best price to you. Our site is an alternative option for consumers to purchase HVAC equipment at lower prices than most traditional dealers or contractors can provide.
We know that purchasing a new or replacement AC system or component is a considerable investment for you, which is why we’ve geared our site toward helping you feel comfortable in choosing the right system or component at the right price to fit your need.
With our concept, you can experience even greater savings when electing to locate your own professionally trained and licensed technician to help you with your installation and service. We have a growing ANSeRs network of Service Centers who can provide warranty, service and maintenance and installs—ask to see if we have one in your area.
Take advantage of our unique buying position by purchasing your next HVAC system or component from ExpressOverstock.com today!
MRCOOL DIY® 5th Gen Pre-Charged Quick Connect Line Set(s) for Multi Zone Systems (R454B)
The MRCOOL DIY® 5th Generation Pre-Charged Line Set is specifically engineered for use with MRCOOL DIY indoor air handlers. This compact line set comes factory pre-charged with eco-friendly R-454B refrigerant and is sealed with MRCOOL’s patented Quick Connect fittings for a true plug-and-play HVAC installation — no special tools, gauges, or certifications required.
This line set is the ideal solution for short-distance installations where the outdoor condenser is located close to the indoor unit. It’s compatible with both single-zone and multi-zone 5th Gen MRCOOL DIY systems that support matching air handlers.
Key Features Line Set Length: 16 feet or 25 feet
Line Sizes: (1)liquid x (1) suction – optimized for mini split indoor units
Refrigerant: Pre-charged with R-454B for fast and eco-conscious setup
Durability: UV-resistant white sleeve with rugged copper lines for long-term reliability
System Compatibility:
MRCOOL Multi-Zone Condensers: Multi2-18K, Multi3-27K, Multi4-36K, Multi5-48K , Multi6-55K (Line set must match indoor unit size)
Installation Notes Designed for short-run installations; great for tight spaces or wall-mounted outdoor units
If total line set length exceeds 25 ft., use couplers and extended Pro Cable (sold separately)
Always follow MRCOOL installation guidelines and torque specifications for best results and warranty compliance
MRCOOL Gen 5 Pre-Charged Mini Split Line Set – R-454B (DIY Ready) Upgrade or extend your MRCOOL DIY 5th Gen mini split system with our genuine MRCOOL Gen 5 Pre-Charged Mini Split Line Set – R-454B. Designed for fast, clean, and easy installation, each line set is pre-charged with R-454B refrigerant and comes ready to connect to compatible MRCOOL air handlers and condensers without the need for special tools, vacuum pumps, or refrigerant gauges.
Whether you're installing a single zone or configuring a multi-zone setup, these pre-charged, quick connect line sets make the job simple and DIY-friendly. Our line set options range from standard 16 ft and 25 ft sizes (which include control wire built into the air handler) to longer combinations using our MRCOOL coupler kits and extended control wire. All sets are designed for MRCOOL's 5th Generation DIY mini splits using the environmentally friendly R-454B refrigerant.
Key Features: Pre-Charged with R-454B Refrigerant – No vacuuming or refrigerant handling required DIY Quick Connect Installation – Perfect for homeowners and contractors alike Multiple Length Options – From 16 ft up to 75 ft (with couplers and control wire) Flexible Configuration – Ideal for new installations, replacements, or extending your existing MRCOOL system Genuine MRCOOL OEM Product – Guaranteed compatibility with MRCOOL Gen 5 R-454B systems Available Length Options: 16 ft (Control Wire pre-attached to the air handler) 25 ft (Control Wire pre-attached to the air handler) 35 ft (35' + Control Wire) 41 ft (25' + 16' + Couplers + Control Wire) 50 ft (50' + Control Wire) 60 ft (25' + 35' + Couplers + Control Wire) 66 ft (50' + 25' + Couplers + Control Wire) 70 ft (35' + 35' + Couplers + Control Wire) 75 ft (50' + 25' + Couplers + Control Wire) Product Compatibility: Compatible with all MRCOOL 5th Gen DIY mini split systems designed for R-454B refrigerant, including wall-mounted air handlers and multi-zone condensers. Please check your system requirements and match the correct lengths and air handler pairing for optimal performance.
Why Choose MRCOOL Pre-Charged Line Sets? With MRCOOL’s patented DIY technology, our pre-charged line sets allow homeowners to install their own HVAC systems safely and confidently. No licensed technician is required for setup when following the provided instructions, making this a cost-effective and stress-free solution for any home.
