MRCOOL® Pre-Charged Line Set for 2nd Gen Systems (R-454B | DIY Installation)

MRCOOL® No-Vac® Pre-Charged Line Set – 3/8" x 3/4" | Compatible with Universal 2nd Gen, Hyper Heat 2nd Gen, VersaPro 2nd Gen & Cased A-Coil (R-454B Refrigerant)

Upgrade your MRCOOL® Universal 2nd Gen, HyperHeat 2nd Gen or VersaPro 2nd Gen central ducted heat pump and cased A-Coil system with the MRCOOL® No-Vac® Pre-Charged Line Set. Engineered for R-454B refrigerant, this innovative, factory pre-charged line set ensures a seamless, stress-free installation—no vacuuming, no refrigerant charging, and no special tools required.

Designed to pair perfectly with MRCOOL’s 2nd Gen Universal Series Heat Pump and Pre-Charged Cased A-Coil, this No-Vac line set delivers unmatched efficiency, safety, and convenience for both professional installers and DIY homeowners.

Available Lengths

• 15-Foot Line Set
• 25-Foot Line Set
• 35-Foot Line Set
• 50-Foot Line Set

Need a custom length? Use MRCOOL® DIY Couplers to safely combine multiple line sets for longer or more specific installation requirements.

Key Features & Benefits

• Compatible with 2nd Gen Systems: Works with MRCOOL® Universal 2nd Gen Heat Pumps, Hyper Heat 2nd Gen, VersaPro 2nd Gen, and Pre-Charged Cased A-Coils.
• Pre-Charged with R-454B Refrigerant: Factory-sealed and ready to install—no need for charging or vacuum pumps.
• No-Vac® Quick Connect Technology: Leak-proof, pre-sealed fittings for a secure, tool-free connection every time.
• Available in Multiple Lengths: 15', 25', 35', and 50' options provide flexibility for any setup.
• DIY Extendable: Use MRCOOL® DIY Couplers to link line sets and achieve custom lengths without compromising performance.
• 3/8" Liquid Line & 3/4" Suction Line: Optimized for superior refrigerant flow and system efficiency.
• Durable, Weather-Resistant Construction: Built with high-quality, corrosion-resistant copper for long-term durability.
• Energy Efficient & Eco-Friendly: Uses R-454B, a low-GWP refrigerant compliant with EPA standards.

Important Compatibility Notice

• ⚠ For R-454B Systems Only: Designed exclusively for MRCOOL® R-454B refrigerant-based systems, including Universal 2nd Gen, Hyper Heat 2nd Gen, VersaPro 2nd Gen, and Cased A-Coils.
• 🚫 Not Compatible with R-410A Systems: Do not use with older MRCOOL® models or R-410A-based units. Doing so may cause damage and void your warranty.

Why Choose MRCOOL® No-Vac® Line Sets?

• ✔ 100% Genuine MRCOOL® product – factory pre-charged and quality tested.
• ✔ Eliminates the need for vacuuming or refrigerant handling.
• ✔ Perfect for DIY installation or professional setup.
• ✔ Designed, tested, and supported in the USA.

Buy from the USA’s Most Trusted MRCOOL® Dealer

When you purchase from MRCOOL HVAC Direct, you’re buying from an authorized MRCOOL® dealer—ensuring quality, warranty protection, and expert support.

• 100% Genuine MRCOOL Products – No third-party sellers or replicas.
• Expert HVAC Support – Get guidance on compatibility, installation, and system pairing.
• Fast & Reliable Shipping – Quick processing and nationwide delivery.
• Competitive Pricing – Best value on official MRCOOL® accessories.

🔥 Upgrade your HVAC system today with MRCOOL® No-Vac® Pre-Charged Line Sets — the fast, clean, and reliable way to complete your Universal 2nd Gen or VersaPro 2nd Gen installation.