What's the big difference between DWV PVC vs Schedule-40 PVC?

DWV PVC vs SCH40 PVC: Key Differences

DWV (Drain, Waste, and Vent) PVC and SCH40 PVC are both types of PVC pipes and fittings, but they have distinct differences:

1. Thickness and Strength:
* SCH40 PVC: Thicker walls, stronger, and more resistant to pressure (up to 150-200 PSI)
* DWV PVC: Thinner walls, less strong, and only suitable for gravity-flow applications (no pressure)

2. Application:
* SCH40 PVC: Used for pressurized systems, such as water supply lines, irrigation, and industrial processes
* DWV PVC: Used for non-pressurized systems, such as drainage, sewage, and venting

3. Fittings and Connections:
* SCH40 PVC: Requires solvent-weld or threaded connections
* DWV PVC: Typically uses hub-and-spigot or push-fit connections

4. Chemical Resistance:
* Both DWV and SCH40 PVC have similar chemical resistance properties

5. Cost:
* DWV PVC: Generally less expensive than SCH40 PVC

6. Color Coding:
* SCH40 PVC: Typically white or light gray
* DWV PVC: Typically black or dark gray

In summary, SCH40 PVC is stronger, thicker, and suitable for pressurized applications, while DWV PVC is thinner, less strong, and only suitable for non-pressurized, gravity-flow applications. Choose the correct type based on your specific needs and application requirements.