What is the inside diameter of 3/8 copper tubing?

What is the inside diameter of 3/8 copper tubing?

Nominal Pipe Size inches O.D. I.D.
3/8 0.500 0.430
1/2 0.625 0.545
5/8 0.750 0.666

What is the difference between Type K and L copper?

Type K is the heaviest. Type L is medium weight and used most often for water lines in homes. Type M is thinner and is used underground or for light domestic water lines if local codes allow.

What is the OD of a 3/8 copper pipe?

BrassCraft3/8 in. O.D. x 36 in. L Chrome Plated Copper Slip Tube, Dead Soft.

What does CTS mean in plumbing?

Copper Tube Sizing
CTS stands for Copper Tube Sizing. This is different from other PVC or CPVC pipes, which commonly use NPS, or Nominal Pipe Size, dimensions. When compared to CTS, NPS is larger in diameter.

Why do copper pipes go green?

Patina, or the greenish colour that appears on copper pipes, happens from oxidation. Oxidation is common on copper when it is exposed to water and air over time. While this oxidized layer is not harmful, it does cause the copper to become corroded.

What size is residential water line?

In most cases, the main pipeline from the street to your home is either 3/4 or 1 inch in diameter, supply branches use 3/4-inch-diameter pipe, and pipes for individual components are 1/2 inch.

How do I know what size my copper pipe is?

How to Size Your Water Supply Lines with Copper Pipes

  1. Find out the circumference of the pipe by wrapping the string around the pipe once.
  2. Lay the string out on a flat surface.
  3. Divide the length by 3.143, and this is the outer diameter of your pipe.


PEX tubing sizes are denoted by CTS (copper tubing size), not OD (Outside Diameter) or ID (Inside Diameter). OD of PEX, copper and CPVC pipe with the same size (CTS) is the same. This is why push fittings can be used with all of these pipes.