Lets dive into the upsides and downsides of plumbing materials
Upside of PVC
Plastic pipes resist corrosion about as well as brass, which manufacturers PVC drains and fittings. PVC drains are more flexible, though brass, among the metals used for drains, is the most malleable. It is lightweight, and easier for anyone to work with, while brass often requires a specialist. Plastic drains are self-insulating and, because they are smooth, do not create slime deposits. They are also known for having tighter fittings than brass.
Upside of Brass
Brass is corrosion resistant and inexpensive. While PVC might be a bit less expensive, it is not as durable. The drain can be plated with nickel or other substances to match the fixtures in the room. Plastic is plastic. Brass does not react in any way to changes in temperature. It is stable and strong in this regard.
Disadvantage of PVC
PVC is liable to crack if stepped on and is in general more delicate during plumbing. PVC is less durable and can crack during freezing temperatures. PVC expands when exposed to hot water, which might, over time, loosen the connections with the drain pipe. PVC inhibits bacteria buildup.
Disadvantages of Brass
Brass is more expensive, depending copper market prices can skyrocket. PVC is often a petroleum product and depending on global markets can fluctuate. Brass is not corrosion resistant forever. Some brass drains need to be coated with nickel for extra protection. Plastic requires no plating at all and is corrosion resistant forever.