In IPS callouts, how much larger is the CT compared to the IPS for a 3/4 IPS?

In IPS (Iron Pipe Size) callouts, a crucial aspect to understand is the relationship between IPS and the corresponding CT (Copper Tube) sizes. For a 3/4 IPS pipe, the nominal pipe size is commonly used for the measurement of the external diameter of the pipe. The CT, or the copper tube size, tends to be larger than the nominal size of the IPS pipe to accommodate the needs of installations where copper tubing is connected to fittings or threaded pipe.

For a 3/4 IPS, the actual outer diameter is typically about 1 inch. The CT for this sizing convention is usually 1/4 inch larger than the IPS size, leading to a CT measurement of 1 inch. This means the CT is indeed 1/4 inch larger than the IPS size of 3/4 inch, making the correct choice regarding how much larger the CT is compared to the IPS.

Understanding these conventions is crucial for proper fitting and sizing in plumbing and HVAC applications, as it ensures compatibility between different piping systems. Recognizing the incremental sizes helps maintain integrity and safety in installations. Therefore, knowing that the CT is 1/4 inch larger than the 3/4 IPS size is essential for smooth and effective plumbing work