Armacell Tubolit DuoSplit Pre-Insulated Twin Copper Pipe 1/4" & 3/8" | 25m Coil | DZC-061088/E25

Armacell Tubolit DuoSplit DZC-061088/E25 is a factory pre-insulated twin copper pipe system — also known as pre-insulated AC pipe, twin pipe lagging, or DuoSplit pipe — for connecting indoor and outdoor units of split, multi-split, air conditioning, and heat pump systems. The patented join-split adhesive technology allows the twin pipes to be easily separated without tools for neat, professional routing.

Key Specifications:

• Pipe sizes: 1/4" (6.35mm OD) liquid line & 3/8" (9.52mm OD) suction line
• Length: 25m coil (Towerpack — 40% less storage space than traditional boxes)
• Insulation material: Polyethylene foam (PEF) with polyolefin copolymer coating
• Thermal conductivity (λ): ≤ 0.036 W/(m·K) at 0°C
• Service temperature: -50°C to +100°C
• Fire rating: Euroclass B₁-s1, d0 (EN 13501-1)
• UV resistance: Very Good, TB 1d2 (EN ISO 4892-2) — suitable for outdoor use
• Standard: EN 14313:2009+A1:2013
• Colour: White
• Country of origin: Spain
• Part number: DZC-061088/E25

Compatible Systems:

• Split AC systems (wall-mounted, ceiling cassette, ceiling concealed)
• Multi-split indoor units
• Air-to-air and air-to-water heat pumps
• Refrigeration systems using 1/4" and 3/8" copper ACR pipework

Compatible Refrigerants: R32, R410A, R22, R134a, and most common refrigerant gases.

Compatible Brands: Suitable for Daikin, Mitsubishi Electric, Fujitsu, Panasonic, Samsung, LG, Hitachi, Toshiba, and most other split AC and heat pump brands using 1/4" & 3/8" pipe connections.

When to Use DuoSplit Pre-Insulated Pipe:

• Ideal for new installations where both refrigerant lines are run simultaneously — eliminates the need to insulate pipes separately on site, saving significant installation time.
• The patented join-split adhesive allows the twin pipes to be separated without tools for routing around corners and through trunking.
• Euroclass B fire rating and Very Good UV resistance make it suitable for both indoor and outdoor pipe runs without additional protection.
• The compact Towerpack coil format reduces van storage space by 40% versus traditional boxed pipe.

Also Available:

• DZC-061288/E25 — Tubolit DuoSplit 1/4" & 1/2" 25m — for larger capacity systems
• DZC-101688/E25 — Tubolit DuoSplit 3/8" & 5/8" 25m — for commercial and larger multi-split systems

Frequently Bought With:

• Mastercool 70051 45° Flaring Tool — professional-grade flaring tool for 1/4" and 3/8" copper pipe ends
• Spin Flaring Tool 1/4" — compact alternative for 1/4" liquid line
• Spin Flaring Tool 3/8" — compact alternative for 3/8" suction line
• Flare Nut Kit — replacement flare nuts for 1/4" and 3/8" connections
• 50mm Self-Adhesive Aluminium Foil Tape — for sealing joints and protecting split sections

Frequently Asked Questions:

What AC systems is the 1/4" & 3/8" DuoSplit suitable for?

The 1/4" liquid line and 3/8" suction line combination is the standard pipe size for most domestic split AC systems up to approximately 5kW. Check your indoor unit's connection specifications before ordering.

Can the DuoSplit be used outdoors?

Yes. The Tubolit DuoSplit has Very Good UV resistance (TB 1d2) and Euroclass B fire rating, making it suitable for outdoor pipe runs without additional UV protection in most installations.

How do I separate the twin pipes for routing?

The patented join-split adhesive allows the two pipes to be pulled apart by hand without tools. They can be re-joined by pressing together. No adhesive or tape is required for the separation process.

Is DuoSplit compatible with R32 systems?

Yes. The Tubolit DuoSplit is compatible with R32, R410A, R22, R134a, and most common refrigerant gases used in split AC and heat pump systems.

What tools do I need to install DuoSplit pipe?

You will need a pipe cutter and a flaring tool to prepare the copper ends, plus flare nuts for the connections. The Mastercool 70051 is the professional-grade choice for 45° flares on 1/4" and 3/8" pipe. No special tools are required to separate the twin pipes themselves.