Pipes:

1. Copper pipes: Copper pipes are durable and resistant to corrosion. They are commonly used for both hot and cold water supply lines, as well as gas lines. Copper pipes can be purchased in various sizes, including 3/8 inches, 1/2 inches, 3/4 inches, and 1 inch.
2. Galvanized steel pipes: Galvanized steel pipes are coated with a layer of zinc to protect against corrosion. They are commonly used for both hot and cold water supply lines, as well as gas lines. Galvanized steel pipes can be purchased in various sizes, including 1/2 inches, 3/4 inches, and 1 inch.
3. Plastic pipes: Plastic pipes are lightweight, easy to install, and resistant to corrosion. They are commonly used for both hot and cold water supply lines, as well as drain lines. There are several types of plastic pipes, including PVC (polyvinyl chloride), PEX (cross-linked polyethylene), and ABS (acrylonitrile-butadiene-styrene).
4. Cast iron pipes: Cast iron pipes are heavy and durable, but they are prone to corrosion over time. They are commonly used for drain lines and sewage systems.

Fittings:

1. Elbows: Elbows are fittings that are used to change the direction of a pipe. They are available in various angles, including 45 degrees, 90 degrees, and 180 degrees.
2. Tees: Tees are fittings that are used to split a pipe into two branches. They are available in various sizes and can be used to connect pipes of different diameters.
3. Couplings: Couplings are fittings that are used to connect two pipes together. They are available in various sizes and can be used to connect pipes of different diameters.
4. Caps: Caps are fittings that are used to close the end of a pipe. They are available in various sizes and can be used to seal off the end of a pipe.
5. Adapters: Adapters are fittings that are used to connect pipes of different diameters or materials. They are available in various sizes and can be used to connect copper pipes to plastic pipes, for example.
6. Unions: Unions are fittings that are used to connect pipes together, but they can also be easily disassembled for maintenance or repair. They are available in various sizes and can be used to connect pipes of different diameters.
7. Flanges: Flanges are fittings that are used to connect pipes to flat surfaces, such as walls or floors. They are available in various sizes and can be used to connect pipes of different diameters.