1-1/4" ID x 20' Copper Tubing, Straight Hard, Type M

Streamline MH12020 – 1-1/4" Type M Hard Copper Tube, 20 Ft Length The Streamline MH12020 is a 20-foot length of 1-1/4 inch nominal diameter Type M hard drawn copper tubing. This straight-length tube is designed for above-ground potable water distribution, hydronic heating, and low-pressure HVAC applications in residential and light commercial systems. Type M copper features a thinner wall than Type L or K and is suitable for applications where internal pressure and mechanical protection requirements are moderate and properly accounted for in design and code compliance. Product Specifications Tube Type: Type M, hard-drawn Material: Seamless copper Nominal Size: 1-1/4" Outside Diameter: 1-3/8" Wall Thickness: Approx. 0.045" Length: 20 feet Pressure Rating: Varies with temperature and joint method (refer to ASME B31.3 and ASTM B88) Temperature Range: Up to 400°F in approved system designs Standards Compliance: ASTM B88, ANSI/NSF 61 and 372 (lead-free) Marking: Incised with type and manufacturer, red ink-coded for Type M Key Features Precision-Drawn for Uniformity – Maintains consistent wall thickness and diameter tolerances for reliable performance in system design Lead-Free Certified – Compliant with U.S. Safe Drinking Water Act standards Rigid Straight Lengths – Provides cleaner runs with fewer couplings compared to coiled tubing Color and Incised Marking – Factory-stamped and red-coded for quick visual verification and code inspection compliance Cost-Efficient for Low-Pressure Applications – Ideal for installations where Type L is not required by local code Application Considerations Type M hard copper is commonly used for domestic water systems, branch lines, and low-pressure hydronic loops when allowed by jurisdiction. Must be joined using solder, brazing, or approved mechanical press systems compatible with hard copper tubing. Not intended for direct burial unless sleeved or otherwise protected as per local requirements.