Mueller Mini Split Line Set – 1/4" x 1/2" Tubing, 3/8" x 1" Insulation, 50 Ft, Plain End, Black (MPN: 40880500B6)

Experience superior HVAC performance with the Mueller Mini Split Line Set, featuring precision-engineered copper tubing designed for reliable refrigerant flow in modern air conditioning systems.

This professional-grade line set delivers exceptional durability and thermal efficiency for your heat pump installations.

Product Overview & Technical Specifications

The Mueller Mini Split Line Set (MPN: 40880500B6) represents the pinnacle of HVAC refrigerant line engineering, combining premium copper construction with advanced insulation technology.

This 50-foot line set features dual-diameter tubing with 1/4" suction line and 1/2" liquid line, surrounded by high-density 3/8" x 1" insulation for optimal thermal protection.

The plain end configuration provides maximum installation flexibility for professional HVAC technicians working with various flare connection types.

The copper tubing construction ensures superior heat transfer efficiency while maintaining structural integrity under high-pressure refrigerant conditions.

Each line set undergoes rigorous quality testing to meet industry standards for air conditioning and heat pump applications. The black exterior finish provides UV resistance and professional aesthetics for both indoor and outdoor installations.

Advanced Insulation Technology for Energy Efficiency

Premium closed-cell insulation surrounding both copper lines minimizes thermal loss and prevents condensation buildup during operation.

The 3/8" wall thickness on the suction line and 1" thickness on the liquid line creates an effective thermal barrier that maintains refrigerant temperatures throughout the entire length of the system.

This insulation technology significantly reduces energy consumption by preventing heat gain in cooling mode and heat loss in heating applications.

The moisture-resistant properties protect the copper tubing from corrosion while ensuring consistent performance across various climate conditions.

Professional installers appreciate the easy-to-work insulation that maintains its properties even after repeated handling during installation procedures.

Copper Tubing Construction & Refrigerant Compatibility

Type L copper construction provides exceptional corrosion resistance and mechanical strength for long-term reliability in refrigerant applications.

The precision-drawn tubing maintains consistent wall thickness and diameter tolerances essential for proper refrigerant flow and system performance. This high-grade copper material withstands extreme temperature fluctuations while maintaining structural integrity.

The tubing is compatible with various refrigerant types including R-410A, R-22, and newer environmentally-friendly refrigerants.

The smooth interior surface minimizes pressure drop and ensures efficient refrigerant circulation between the evaporator and condenser units. Each tube undergoes dehydration and nitrogen pressurization during manufacturing to prevent contamination.

Professional Installation Features

Plain end configuration allows HVAC technicians to create custom flare connections sized specifically for each installation requirement. This flexibility eliminates the need for additional fittings while ensuring leak-free connections when properly installed.

The 50-foot length accommodates most residential and light commercial applications without requiring joints or splices.

Professional installers benefit from the pre-insulated design that reduces installation time while ensuring consistent insulation coverage.

The line set arrives clean and sealed, ready for immediate installation without additional preparation steps. The copper tubing can be easily bent and routed through walls, floors, and tight spaces without compromising structural integrity.

Heat Pump & Air Conditioning System Integration

This line set seamlessly integrates with modern mini split heat pump systems, providing efficient refrigerant transport between indoor air handler units and outdoor condenser units.

The dual-diameter design accommodates the different flow requirements of liquid and gas refrigerant phases throughout the cooling and heating cycles.

The precision engineering ensures optimal subcooling performance in cooling mode while maintaining proper superheat levels during heating operation.

System efficiency improves through reduced pressure drop and minimized thermal losses. The line set supports both cooling and heating functions, making it ideal for year-round climate control applications.

Quality Assurance & Performance Standards

Every Mueller line set undergoes comprehensive quality testing including pressure testing, insulation integrity verification, and dimensional accuracy inspection.

The manufacturing process follows strict industry standards to ensure consistent performance and reliability. Quality control measures include cleanliness verification and proper sealing to prevent contamination during storage and transportation.

The copper tubing meets ASTM B88 specifications for seamless copper water tube, while the insulation complies with industry standards for thermal performance and fire safety.

Each line set includes proper labeling for easy identification and installation verification. The manufacturing process ensures uniform wall thickness and consistent diameter throughout the entire length.

Cost-Effective Solution for HVAC Projects

Plumbing Supply And More offers competitive pricing on this premium line set, providing exceptional value for professional contractors and DIY enthusiasts.

The pre-insulated design eliminates the need for separate insulation purchases while reducing labor costs during installation. This cost-effective solution delivers professional results without compromising quality or performance.

The 50-foot length reduces waste while providing adequate material for most installation scenarios.

Bulk purchasing options are available for contractors working on multiple projects. The reliable performance and extended lifespan provide long-term value through reduced maintenance and replacement costs.

Technical Support & Installation Guidelines

Professional installation ensures optimal performance and system longevity, with proper flaring techniques and refrigerant handling being critical for success.

The plain end configuration requires professional flaring tools and techniques to create leak-free connections. Proper brazing procedures must be followed when connecting to system components.

Installation best practices include proper line routing to minimize bends and restrictions, adequate support for long runs, and protection from physical damage.

The insulation should remain intact throughout the installation process to maintain thermal performance. System evacuation and refrigerant charging should follow manufacturer specifications and local codes.

Compatibility & System Requirements

This line set is compatible with most major mini split system manufacturers when proper installation procedures are followed.

The standard copper tubing dimensions ensure compatibility with common flare fittings and system connections. Verify system requirements before installation to ensure proper sizing and compatibility.

The line set supports various capacity ranges depending on the specific system requirements and installation conditions.

Proper sizing calculations should consider factors such as line length, elevation changes, and ambient temperature conditions. Consult system documentation for specific compatibility requirements and installation guidelines.

Warranty & Customer Support

Plumbing Supply And More stands behind the quality of Mueller products with comprehensive warranty coverage and dedicated customer support. The warranty covers manufacturing defects and material quality issues when installed according to professional standards.

Customer support is available to assist with technical questions and installation guidance.

Product registration and proper installation documentation may be required for warranty coverage.

Keep all installation records and follow recommended maintenance procedures to ensure continued warranty protection. Contact Plumbing Supply And More for specific warranty terms and conditions.

Why Choose Plumbing Supply And More

As your trusted HVAC supply partner, Plumbing Supply And More provides premium Mueller products with expert technical support and competitive pricing.

Our extensive inventory ensures quick availability while our knowledgeable staff can assist with product selection and technical questions. We understand the demands of professional HVAC work and provide the quality products needed for successful installations.

Our commitment to customer satisfaction includes fast shipping, accurate order fulfillment, and responsive customer service.

Whether you're a professional contractor or a skilled DIY installer, we provide the products and support needed to complete your project successfully. Trust Plumbing Supply And More for all your HVAC supply needs.