MRCOOL® DIY25-3858C-O — R-454B 25ft 3/8″ + 5/8″ Lineset for DIY 24K & 36K Indoor w/ DIY Pro Cable

HVAC cable — MRCOOL® DIY25-3858C-O — R-454B 25ft 3/8″ + 5/8″ Lineset for DIY 24K & 36K Indoor w/ DIY Pro Cable

The HVAC cable (manufacturer part DIY25-3858C-O) is a genuine OEM cable available at Cedars HVAC, your trusted source for heating, cooling, and refrigeration parts. We stock this cable for fast nationwide shipping direct from the distribution center, so contractors, facility managers, and homeowners can get the exact replacement they need without delay.

Product details

MRCOOL® DIY25-3858C-O — 25ft R-454B Line Set with DIY Pro Cable

Complete your MRCOOL mini-split installation with this official R-454B line set. The DIY25-3858C-O is a 25-foot pre-charged-compatible line set with 3/8″ + 5/8″ copper tubing, designed specifically for DIY 24K & 36K Indoor w/ DIY Pro Cable units. Pre-flared ends make installation straightforward — no special tools required.

Key Features

• 25-Foot Length — great for most single-room installations
• Line Sizes: 3/8″ + 5/8″ — correct diameter for DIY 24K & 36K Indoor w/ DIY Pro Cable
• R-454B Compatible — engineered for MRCOOL’s current refrigerant standard
• Pre-Flared Ends — no flaring tool needed, connects directly to your unit
• Insulated Lines — foam insulation minimizes energy loss and condensation
• DIY Pro Cable Included — pre-terminated electrical cable for plug-and-play connection, no wire stripping needed
• MRCOOL Official Part — sourced directly from MRCOOL, guaranteed compatibility

Compatibility

This line set is designed for use with MRCOOL DIY 24K & 36K Indoor w/ DIY Pro Cable. Always verify your indoor unit’s line set specifications before ordering. Need help selecting the right line set? Call Cedars HVAC at [email protected].

Installation Note

This line set includes the DIY Pro Cable for complete plug-and-play installation. No electrician required for the line set connection — simply plug in and connect.

Bundle & Save

Purchasing a MRCOOL DIY mini-split? Add this line set to your order and complete your installation in one shipment. Questions about which line set you need? Email us at [email protected].

Why buy from Cedars HVAC

• Genuine OEM HVAC parts — not aftermarket substitutes
• Contractor-friendly pricing on every cable
• Fast nationwide shipping direct from the distribution center
• Real HVAC expertise — email us at [email protected] if you need help confirming compatibility
• Financing available at checkout

About this part

This HVAC cable is part of our Line Sets catalog. Contact us if you need help identifying compatible models or sourcing volume quantities. For installation guidance, always refer to the manufacturer documentation and consult a licensed HVAC technician where required.

Shipping and returns

Most HVAC cable orders ship the same or next business day direct from the distribution center. Standard ground shipping covers the continental United States, and expedited options are available at checkout. Returns are accepted within 30 days on unopened, uninstalled parts — see our return policy for full details. International shipping is available on request; contact our team for a quote.

Frequently asked questions

Is this part new and in stock? Yes, we list only in-stock items. The HVAC cable ships direct from the distribution center the same or next business day.

Will this cable fit my equipment? Compatibility depends on the model and revision of your existing equipment. If you need help confirming fitment for the HVAC cable, email us at [email protected] with your unit model number and we will confirm before you order.

Can I get a contractor or wholesale discount? Yes. Cedars HVAC offers volume pricing for licensed HVAC contractors, property managers, and resellers. Request contractor pricing or call us to set up an account.

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