PVC (polyvinyl chloride) is affordable, durable, and easy to work with. It replaced old materials like iron and copper in most modern plumbing systems. Let’s break down exactly where PVC shines, why plumbers love it, and when you shouldn’t use it and what PVC is used for in plumbing.
What is PVC?
PVC is a type of plastic designed to be tough, lightweight, and resistant to rust and chemicals. It comes in two main types:
- Schedule 40: Everyday pipes for drains and low-pressure water.
- Schedule 80: Thicker, stronger pipes for heavy-duty jobs (like industrial systems).
6 Everyday Uses of PVC in Plumbing
Here’s where you’ll find PVC pipes in homes, businesses, and even farms:
1. What is PVC used for in plumbing?
PVC is the best material for drain pipes. It is smooth inside, so things like hair or grease won’t stick easily. Have you ever flushed a toilet? The waste will likely flow through a PVC pipe to your sewer or septic tank.
2. Vent Pipes
Those pipes sticking out of your roof? They’re PVC vents. They let air into your plumbing system so drains work smoothly (no gurgling sinks!).
3. Cold Water Supply
PVC delivers cold water to sinks, showers, and washing machines. But here’s the catch: Don’t use it for hot water. Regular PVC warps at high temps—use CPVC instead..
4. Underground Sewer Lines
PVC is perfect for burying underground. It doesn’t decay, rust, or crack, even in wet soil.
5. Irrigation Systems
Farmers and gardeners use PVC to water crops or lawns. It’s cheap, lasts decades, and won’t break down in sunlight.
6. Chemical Transport
Factories and labs use PVC pipes to move acids or chemicals. Unlike metal, PVC won’t react and leak dangerous stuff.
Why Plumbers Prefer PVC Over Metal Pipes
PVC isn’t perfect, but it beats old materials in most cases. Here’s why:
- Cheaper: PVC costs about half the price of copper.
- No Rust: Metal pipes rot over time. PVC? It’ll look the same in 30 years.
- Easy to Install: You can glue PVC pipes together in just a few minutes. You don’t need to weld them or use any special tools.
- Lightweight: Carry a bundle of PVC pipes by hand. Try that with iron!
- The downside: PVC isn’t great for hot water or outdoor use in freezing temps. But for drains and cold water? It’s unbeatable.
How to Work with PVC Pipes: 5 Simple Tips
- Support: Use pipe straps eCutting: Use a PVC cutter for clean slices. Sand rough edges.
- Gluing: Wipe pipes with primer first (the purple stuff), then add cement. It melts the plastic slightly to seal joints.very 4 feet so pipes do not fall.
- Avoid Sunlight: UV rays make PVC brittle. Paint outdoor pipes or bury them.
- Check Codes: Local rules might require specific pipe sizes or types.
- Mistake to avoid: Don’t over tighten fittings. Hand-tighten, then give a small quarter-turn with a wrench.
Frequently Asked Questions
Q: Is PVC safe for drinking water?
Yes, if it’s labeled “NSF-61” or “safe for potable water.” Avoid using recycled PVC for this.
Q: How long do PVC pipes last?
Most last 50–100 years. I’ve seen 1970s PVC drains still working fine!
Q: Can PVC freeze and burst?
It can, but it’s less likely than copper. Insulate pipes in cold areas.
Q: Can I recycle PVC pipes?
Technically yes, but most recycling centers won’t take them.
Final Thoughts
If you’re going to a plumbing project, PVC is your best friend. Just remember to use CPVC for hot water and insulate pipes in cold climates.