The three main types of plumbing systems are:
Water Supply Plumbing: This system delivers clean water into a building or home. It includes pipes, faucets, valves, and other fixtures that bring water from a municipal water system or a well to the home.
Drainage Plumbing: This system removes wastewater and sewage from the home or building. It involves the drainage pipes, vents, and traps that carry wastewater to sewer lines or septic tanks.
Vent Plumbing: The vent system helps maintain proper air pressure in the drainage pipes. It includes pipes that vent air outside the building, ensuring that wastewater flows smoothly and doesn't create a vacuum that could cause blockages or odors.

Water plumbing costs can vary, but here's a quick overview:
New installation: $1,500 to $15,000+ for re-piping a house.
Repairs: $150 to $500 for fixing leaks.
Water heater: $800 to $2,500 for installation.
Plumber hourly rate: $45 to $200.
Materials: PVC ($0.50–$2/ft), PEX ($0.50–$3/ft), Copper ($2–$5/ft).

The longest-lasting water pipe material is copper. Copper pipes can last 50 to 70 years, or even longer with proper care. They are durable, resistant to corrosion, and maintain water quality well over time.
Other materials:
PEX pipes: Last about 40–50 years.
PVC pipes: Typically last 25–40 years.
Copper is still considered the gold standard for longevity, but newer materials like PEX are more cost-effective and easier to install.

For shower plumbing, PEX is the best choice, flexible, affordable, and easy to install (40–50 years lifespan). Copper is also great for durability and longevity (50–70 years), but it’s pricier.