PVC stands for polyvinyl chloride, a durable, lightweight plastic used in many piping systems. On this page, you’ll see common types like Schedule 40 (everyday plumbing and irrigation), Schedule 80 (thicker walls for higher pressure), flexible PVC, and furniture-grade pipe for DIY frames and projects.

• Why people choose it: Corrosion resistance, easy cutting, and simple solvent-weld joining.
• Sizes: Listed by nominal size; outer diameter stays standard for fittings.
• Lengths: Many options include cut-to-length to match your project.

Selection typically depends on pressure needs, temperature, and local code. If you’re unsure, reviewing the product specs and checking with your building department can help you pick the right type.

PVC is a thermoplastic—a type of plastic that softens with heat and hardens as it cools. In pipe form, it’s usually rigid, smooth inside, and resistant to rust and many chemicals.

• Common uses: Drain, waste and vent lines, irrigation, pool and spa plumbing, and DIY frames (with furniture-grade pipe).
• How it joins: Typically with primer and solvent cement that “welds” the parts.
• Limitations: Not designed for very high temperatures; UV exposure can affect standard white pipe outdoors unless protected.

Project needs vary, so it’s a good idea to compare product specifications (pressure and temperature ratings) and follow local building codes before choosing a pipe style.

The purple liquid you see is PVC/CPVC primer. It’s tinted so installers and inspectors can confirm it was applied. Primer helps clean and soften the pipe and fitting so the solvent cement can bond them effectively.

1. Dry-fit the parts to check alignment.
2. Apply primer to the pipe and fitting sockets (many codes require it).
3. Apply solvent cement while the primer is still fresh, then assemble with a slight twist.

Always follow the adhesive manufacturer’s instructions and allow proper cure time. Ventilation and basic PPE can be helpful during application. Cure times and requirements can vary by product, temperature, and humidity.

Use rules depend on local building codes and the application. Generally:

• Often allowed: PVC is commonly permitted for drain, waste, and vent (DWV) systems.
• Pressurized water: Some areas limit PVC for interior water distribution, especially for hot water, favoring materials like CPVC or other options. Temperature and pressure ratings matter.
• Special areas: Many codes restrict PVC in return-air plenums and similar spaces.

Because requirements vary by jurisdiction, it’s best to verify with your local building department or a licensed professional. Checking the pipe’s specifications (pressure and temperature ratings) against your project needs can also help you choose an appropriate product.

Both use the same outer diameter per nominal size, so fittings are interchangeable. The key differences are inside:

• Wall thickness: Schedule 80 has thicker walls than Schedule 40.
• Pressure rating: Schedule 80 is rated for higher pressures.
• Flow area: Because Schedule 80 is thicker, its inside diameter is smaller, which can affect flow.
• Color: Schedule 40 is often white; Schedule 80 is often gray (color isn’t a performance rule, but is a common cue).

Choosing between them depends on your pressure, temperature, and code requirements. For many residential drainage and low-pressure applications, Schedule 40 is typical; higher-pressure or industrial settings may call for Schedule 80. Always consult product specs and local codes.