Copper tube cap is a component used in plumbing to close off the end of a copper tube or pipe. It serves to seal the tube, preventing the leakage of fluids or gases and protecting the interior from external elements. Copper tube caps typically have a cylindrical shape with a closed end, effectively sealing off one end of the tube. The open end may be designed for various types of connections. The open end of the copper tube cap is often designed for a sweat or solder connection. This involves heating the tube end and the inside of the cap and applying solder to create a secure and watertight connection.

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