MRCOOL pre-charged Quick Connect line set
MRCOOL Quick Connect brass fittings
MRCOOL pre-charged line set with Quick Connect fittings
MRCOOL® DIY® 5th Gen · Line Set

25 ft No-Vac Line Set

25' R-454B No-Vac Lineset

Model: NV25-3834-O

$440.00Free shipping
25 ftLength
3/8″ × 3/4″Line size
Length · 3/8″ × 3/4″ line set Measure twice: pick the shortest length that reaches.
  • Free shipping to the lower 48 · tracking emailed
  • 7-yr compressor / 5-yr parts warranty
  • No vacuum pump or special tools
  • Real install help from people who've done it
Overview

Replace or extend your existing lineset with confidence. The MRCOOL® 25' R-454B No-Vac Lineset is a direct match for the lineset included with your DIY® single-zone condenser — pre-charged with R-454B refrigerant and ready to connect without a vacuum pump or professional help. A perfect spare or swap for MRCOOL® DIY® Quick Connect® systems.

Shipping & returns

Free shipping to the lower 48. Orders are processed within 1–2 business days and we email tracking as soon as your order ships. See our Shipping Policy and Returns & Refunds.

Before you buy
What size do I need?Sizing guide Breaker, wire & voltageElectrical guide Line set lengths & couplersLine set guide How the install worksInstall guide
How it goes in

Four steps. One weekend.

  1. Hang the air handler

    Level the wall plate, drill the pass-through, and hang the indoor unit.

    Indoor

  2. Set the condenser

    Place the outdoor unit on a pad or wall bracket with clearance to breathe.

    Outdoor

  3. Connect the lines

    Run the pre-charged Quick Connect® line set and tighten both ends with two wrenches.

    Lines

  4. Power up

    Hook up the dedicated circuit, pair the SmartHVAC app, done.

    Power

Electrical hookup must follow local code.

Complete the install

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