For contractors working on high-performance plumbing systems, selecting the right fittings can make all the difference in durability and long-term results. At LESSO America, we provide Schedule 80 fittings designed for strength, reliability, and a wide range of commercial and industrial applications. This guide outlines the core differences between Schedule 40 and Schedule 80 fittings, highlights the available types, and offers practical tips for successful installation.

Understanding the Difference: Schedule 40 vs. Schedule 80

Both Schedule 40 and Schedule 80 fittings serve vital roles in piping systems, but their applications vary depending on pressure and durability requirements.

Schedule 40 fittings are commonly used in residential or light commercial applications. They offer standard wall thickness and are suitable for low-pressure systems.

Schedule 80 fittings, on the other hand, are built with thicker walls. This added thickness allows them to handle higher pressure and more demanding environments. While both types share the same outer diameter, Schedule 80 fittings have a smaller internal diameter due to the increased wall thickness. This structural enhancement makes Schedule 80 fittings the preferred choice for commercial facilities, industrial plants, chemical processing systems, and other high-stress applications.

Types of Schedule 80 Fittings Available

At LESSO America, we supply a wide range of Schedule 80 fittings to support the needs of contractors across various industries. These include:

Elbows – Available in 45° and 90° angles, ideal for changing pipe direction.

Tees – Used to join three pipes for efficient branching.

Couplings – Provide a secure connection between two pipe sections.

Bushings – Reduce the size of a pipe fitting to match the required diameter.

Unions and Flanges – Allow for easy disassembly and maintenance.

Caps and Plugs – Used to seal pipe ends for safe pressure containment.

All Schedule 80 fittings from LESSO America are manufactured to meet ASTM standards, offering consistency and peace of mind for professionals working under tight schedules and technical requirements.

Best Practices for Installing Schedule 80 Fittings

Proper installation is key to ensuring optimal performance and longevity in any plumbing system. Here are a few practices to keep in mind:

Use the Correct Primer and Cement: Always use a high-quality primer and solvent cement designed for Schedule 80 PVC to ensure a secure bond.

Allow Proper Cure Time: Give the fittings adequate time to cure based on the temperature and pipe size. Rushed installations can compromise pressure resistance.

Check for Clean, Dry Surfaces: Make sure pipe ends and fitting sockets are clean and dry before joining.

Avoid Over-Tightening Threads: While strength is essential, overtightening can lead to cracks or warping. Hand-tighten threaded fittings, then turn an additional 1 to 2 turns using a wrench.

Supporting Contractors Across America

We understand the pressure contractors face to deliver safe, functional, and efficient plumbing systems. That’s why LESSO America is committed to offering reliable products that meet performance expectations. Our Schedule 80 fittings are widely used in water treatment plants, mechanical systems, and commercial buildings throughout the U.S.

Conclusion

For professionals working in tough environments, Schedule 80 fittings provide the strength and durability needed to keep systems running smoothly. With a wide selection of types and sizes, LESSO America offers the support contractors need for high-pressure projects. By understanding the differences between Schedule 40 and Schedule 80, choosing the right fittings, and following proper installation steps, contractors can ensure long-term reliability and safety in every project.

Explore our Schedule 80 fittings today and build with confidence—backed by the strength of LESSO America.