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- Rigid copper pipe is good for new installation. Soft or flexible copper pipe is good for repair work since it can bend around obstacles without multiple cuts and joints.
- Type K is heaviest, used in municipal, commercial, residential and underground installation; Type L is medium weight and is the most commonly used in residential water lines; Type M is hard and thin.
- Recommended for light domestic water lines and not permitted in some city codes or for underground use.
- Common sizes are 3/8”, 1/2 and 3/4”.
- Refrigeration tube has moisture removed and ends sealed for better performance of refrigerants. Often used in heater connections but may corrode. For heater connections, use flexible brass or aluminum.
- Larger sizes also used for DWV (drain-waste-vent) applications.