The answer to 'types of supply line' is that there are several common types of supply lines used in plumbing systems for homes. The most common types are flexible supply lines and rigid supply lines.
Flexible supply lines are made of braided stainless steel or plastic and are commonly used to connect plumbing fixtures like sinks, toilets, and washing machines to the main water supply. They are easy to install and can accommodate some movement and flexibility in the plumbing. Rigid supply lines are made of copper or rigid plastic piping and are typically used for longer runs of plumbing to connect the main water supply to different fixtures. Rigid lines provide a more permanent and sturdy connection but require more specialized installation.