Industrial piping systems rely on durable threaded connections to maintain performance, prevent leaks, and ensure long service life. However, standard plastic threaded fittings can sometimes fail due to over tightening, radial stress, or weak transitions between plastic and metal piping.
PVC Schedule 80 Special Reinforced Fittings are designed to solve these problems by strengthening threaded connections and improving sealing performance in demanding industrial environments.
What Are PVC Schedule 80 Special Reinforced Fittings?
PVC Schedule 80 Special Reinforced fittings are engineered thermoplastic fittings designed to improve the durability and reliability of threaded pipe systems. Their reinforced thread design uses a precompression system and external reinforcing collar that contains expansion forces created during thread assembly.
This advanced design helps prevent the common failures associated with traditional plastic threaded fittings, especially when fittings are tightened beyond recommended limits.

Prevent Split Threads in Plastic Pipe Fittings
One of the most common problems with plastic threaded fittings is cracking caused by radial stress during installation. When tapered pipe threads are tightened, significant expansion forces can develop inside the fitting.
Special Reinforced fittings are engineered to contain these expansion forces and reduce stress on the fitting body. The reinforced collar helps prevent splitting and protects the threads even if the fitting is accidentally over tightened.
This added strength increases reliability and reduces the risk of system failure.
Improved Sealing Performance
Another advantage of PVC Schedule 80 Special Reinforced fittings is improved sealing capability. Because the reinforcing structure limits expansion of the fitting body, thread contact between the pipe and fitting is improved.
Better thread engagement results in stronger seals, reducing the risk of leaks in industrial piping systems.
Strong Plastic to Metal Pipe Transitions
Many piping systems require transitions between plastic and metal components. These connections can be challenging because plastic and metal expand differently when temperatures change.
Special Reinforced fittings allow direct connection to threaded metal pipe using a single adapter while maintaining system strength. The restraining collar helps equalize thermal expansion differences between materials, eliminating the need for pressure de rating typically required with standard plastic threaded fittings.
This creates a reliable and cost effective plastic to metal pipe transition.
Corrosion and Chemical Resistance
PVC Schedule 80 Special Reinforced fittings are manufactured from durable thermoplastic compounds designed for chemical and corrosion resistance. This makes them ideal for industrial environments where metal fittings may corrode over time.
The external reinforcing ring also improves resistance to harsh environments and extends the life of the piping system.
Manufactured to ASTM Standards
Quality and performance are critical in industrial piping systems. PVC Schedule 80 Special Reinforced fittings are manufactured to meet ASTM dimensional and hydrostatic pressure requirements.
PVC Schedule 80 fittings conform to ASTM D2467 standards, ensuring consistent manufacturing quality and dependable performance in pressure piping systems.
Available Sizes and Configurations
PVC Schedule 80 Special Reinforced fittings are available in sizes ranging from 1/4 inch to 6 inches and are offered in several common configurations, including:
- 45 and 90 degree Elbows
- Tees and Reducing Tees
- Couplings and Reducing Couplings
- Female Adapters
- Reducing Bushings
- Caps
- Unions
These options make it easy to integrate reinforced fittings into a wide range of industrial piping systems.
Why Choose PVC Schedule 80 Special Reinforced Fittings?
PVC Schedule 80 Special Reinforced Fittings offer important advantages for industrial piping applications:
- Prevent split threads in plastic pipe fittings
- Improve sealing performance
- Strengthen threaded pipe connections
- Support reliable plastic to metal transitions
- Provide excellent chemical and corrosion resistance
- Meet ASTM manufacturing standards
For industrial piping systems that demand reliability and long service life, Special Reinforced fittings provide a stronger and safer threaded connection.

