Mueller Industries D 04020P Seamless Copper Tube 0.25 in Od

Product Description

The MUELLER INDUSTRIES D 04020P is a seamless copper tube manufactured from Alloy 122 copper, available in a 20-foot length with a 0.25-inch outside diameter and a 0.03-inch wall thickness. The inside diameter measures 0.19 inches. Alloy 122 copper, also known as phosphorus-deoxidized copper, offers excellent corrosion resistance and is well suited for soldering and brazing operations. This tube is used by HVAC technicians, plumbers, and refrigeration mechanics in a wide range of fluid and gas transfer applications. Its seamless construction eliminates weld seams, reducing the risk of failure under pressure or vibration.

This seamless copper tube is a standard choice for residential and light commercial HVAC refrigerant lines, plumbing supply runs, and instrumentation tubing installations. The 0.25-inch OD size is commonly used for low-volume refrigerant circuits, sensing lines, pilot lines, and small-bore water supply connections. Alloy 122 copper is compatible with both soldered and brazed fittings, making it versatile across plumbing and refrigeration service work. The 20-foot length provides enough run for most single-appliance or short-circuit applications without a field splice.

Key Features

• Seamless construction for uniform wall integrity and consistent pressure performance
• Alloy 122 phosphorus-deoxidized copper supports soldering and brazing without flux-related porosity issues
• 0.25-inch OD with 0.19-inch ID and 0.03-inch wall thickness for precise fitting compatibility
• 20-foot straight length reduces field joints in short runs
• Suitable for refrigerant, water, and instrumentation service applications

Compatibility

Designed as a standard OEM-style seamless copper tube for use with 0.25-inch OD copper tube fittings in HVAC, refrigeration, and plumbing applications.

Installation Notes

Installation should be performed by a licensed HVAC technician or plumber in accordance with applicable local plumbing codes and ASHRAE or IFGC guidelines. Shut off the refrigerant circuit or water supply and depressurize the line before cutting or fitting. Use a clean tube cutter sized for 0.25-inch OD copper to avoid deforming the tube end, and ream the cut edge before soldering or brazing. Avoid kinking during bending; use an appropriately sized tube bender to maintain wall integrity.