
PVC Straight Coupling offering exceptional performance and reliability. Crafted from high-quality PVC material, this product ensures long-term stability under various environmental conditions. Its distinctive design features a smooth inner surface and precise outer diameter dimensions, effectively reducing water flow resistance and enhancing the efficiency of the piping system. Additionally, the coupling's surface has been meticulously treated to provide corrosion resistance and chemical durability, making it suitable for a wide range of fluid applications, including drinking water and industrial wastewater.
The product comes in multiple specifications, ranging from D50 to D315, catering to different pipe diameters. Each specification undergoes rigorous quality testing to ensure dimensional accuracy and sealing performance. Notably, the larger sizes (such as D200, D250, and D315) are ideal for large-scale industrial projects or municipal engineering, capable of withstanding higher pressure and flow requirements. The coupling can be installed quickly and easily using specialized tools, significantly saving construction time and costs.
Furthermore, our PVC Straight Coupling boasts outstanding weather resistance, functioning reliably within a temperature range of -20°C to 60°C, adapting well to climatic conditions. Whether used indoors or outdoors, it maintains consistent performance. The product's eco-friendly characteristics are also noteworthy, complying with multiple international environmental standards, being non-toxic and harmless to the environment.

The PVC Reducing Coupling is a versatile fitting designed to connect pipes of different diameters, widely used in drainage, water supply, and industrial piping systems. Made from high-quality PVC material, this product offers corrosion resistance and anti-aging properties, ensuring long-term stable performance in various harsh environments. Its unique design allows for seamless transitions between two pipes of differing diameters, guaranteeing smooth water flow with no leaks.
Visually, the PVC Reducing Coupling features two ends with distinct inner diameter sizes, such as common specifications like D75×D50, D110×D50, etc., catering to diverse pipe connection requirements. The surface is smooth, and the edges are meticulously finished to minimize water resistance and enhance overall system efficiency. Additionally, the product undergoes rigorous testing to meet international standards, ensuring reliable sealing and durability under high pressure and temperature conditions.
In practical applications, the PVC Reducing Coupling is commonly used in building drainage systems, agricultural irrigation pipelines, and industrial wastewater discharge systems. Its lightweight nature and ease of installation significantly reduce construction difficulty and costs. Whether for new pipeline installations or retrofitting existing systems, this product provides a reliable solution, making it an ideal choice for modern piping engineering.

PVC Decentered Reducing Coupling is a high-quality accessory specifically designed for pipe connections, particularly suitable for scenarios where pipes of different diameters need to be joined. This product features an advanced eccentric design that effectively reduces flow resistance, ensuring smooth fluid movement within the pipes while minimizing noise and vibration, thereby enhancing the overall system efficiency.
The product comes in various specifications, including D75×50, D110×50, D110×75, and more, catering to diverse engineering requirements. Its unique eccentric structure allows smaller diameter pipes to seamlessly connect to larger diameter pipes without the need for additional transition pieces, simplifying the installation process and saving time and costs. Additionally, the surface of the coupling has been meticulously treated to ensure smoothness and flatness, enhancing its corrosion resistance and extending its service life.
In practical applications, this PVC Decentered Reducing Coupling is widely used in building water supply and drainage systems, industrial piping projects, and agricultural irrigation fields. Its reliable sealing performance and durability make it a preferred choice among engineers and construction personnel. Whether for new pipe installations or upgrades to existing systems, this product offers exceptional solutions.

PVC Extended Expansion Joint is designed to compensate for thermal expansion and contraction in piping systems, effectively absorbing length changes caused by temperature variations. This prevents stress concentration and damage to connection points. Made from premium PVC material, it is corrosion-resistant, wear-resistant, and maintains stable performance over time, making it ideal for water supply, drainage, and ventilation systems.
The joint is equipped with a high-sealing rubber ring at the connection point, allowing for quick installation without the need for extra adhesives or welding. This not only saves construction time but also simplifies future maintenance. The internal structure is engineered for smooth fluid flow, minimizing resistance and leakage risks at joints.
Available in a full range of sizes—D50(18cm), D75(18cm), D110(22cm), and D160(26cm)—it meets the needs of various pipe diameters. Packaging is optimized for transportation and storage: D50 with 130 pieces per carton, D75 with 60 pieces, D110 with 24 pieces, and D160 with 14 pieces per carton.
Whether for new projects or pipe system renovations, the PVC Extended Expansion Joint is an ideal choice to enhance system stability and extend service life, offering exceptional strength and reliable sealing performance for your engineering needs

Our PVC Reinforced Straight Coupling is a high-quality product specifically designed for pipe connections, widely used in construction, industrial, and municipal engineering projects. This coupling is made from premium PVC material with internal reinforcement, ensuring stability and durability even under high pressure and flow conditions.
The product comes in various specifications, including D50, D75, and D110 millimeters, catering to different pipe sizes. The packaging quantities are 360 pieces for D50, 120 pieces for D75, and 48 pieces for D110, allowing users to purchase according to their specific needs. Additionally, the product features a simple and elegant design with a smooth surface, making it easy to install and maintain. It also has corrosion resistance, suitable for use in harsh environments.

PVC Reinforced Expansion Joint with Cleanout is engineered for modern piping systems, combining durability and functionality for applications in building drainage, industrial pipelines, and municipal infrastructure. Constructed from high-strength PVC, it offers resistance to corrosion and aging, ensuring long-term performance in challenging environments including moisture and chemical exposure.
The joint features an internally reinforced rib structure that significantly enhances pressure resistance and structural stability, minimizing deformation under dynamic loads or vibration. Its flexible expansion section accommodates thermal expansion, contraction, and minor ground movement, preventing stress-induced cracks and leaks at the connection points.
A dedicated cleanout port is integrated into the side of the joint, allowing easy access for routine maintenance. This feature enables quick removal of debris or sediment without dismantling the entire pipeline, reducing downtime and labor costs—ideal for systems prone to clogging or requiring regular inspection.
Available in multiple configurations, the product includes standard sizes such as D50, D75, and D110, as well as reduced-union variants like D75×50, D110×50, and D110×75, providing versatility for different pipe diameter transitions. This range supports both new installations and retrofit projects with reliable, seamless connections.
Packaging is optimized by size to ensure safe transport and efficient storage. Each box contains 120 units for D50, 36 for D75, 24 for D110, 56 for D75×50, 36 for D110×50, and 30 for D110×75, facilitating bulk handling and on-site logistics.
The compact design ensures a secure fit, with a dual-seal system using rubber gaskets to prevent leakage. Installation is tool-free and straightforward, suitable for both indoor and outdoor use. This joint delivers a reliable, low-maintenance solution that enhances the overall integrity and serviceability of piping systems.

Offering exceptional durability and flexibility. Made from premium PVC material and processed with special techniques, this joint boasts outstanding tensile and compressive strength, effectively addressing displacement issues caused by temperature changes or ground settlement in pipes.
The product is compact and easy to install, suitable for various pipe connection scenarios, including water supply, drainage, fire protection, and industrial pipe systems. Its unique structural design not only enhances the joint's strength but also ensures stability and reliability under different working conditions. Additionally, the use of PVC material provides corrosion resistance and chemical stability, allowing the product to withstand harsh environments without aging over time.
We offer multiple specifications to meet diverse needs, including sizes D50, D75, and D110, each rigorously tested for quality assurance to ensure consistency and high performance. Whether for new construction projects or pipe renovation works, this PVC Reinforced Expansion Joint is an ideal choice.

Type A PVC Flat Straight Coupling made from polyvinyl chloride (PVC). It features an innovative flat design that not only saves space but also reduces water flow resistance, enhancing the efficiency of the piping system.
With specifications of D60x35 millimeters, this coupling is suitable for pipes with a diameter of 60 millimeters, ensuring a tight and stable connection. Each package contains 280 couplings, making it ideal for bulk purchases and large-scale installation projects, which lowers the cost per unit and improves construction efficiency.
The PVC material provides chemical stability, resisting corrosion from various acids and alkalis, making it widely applicable in industrial, agricultural, construction, and municipal engineering fields. Additionally, the manufacturing process strictly adheres to industry standards, ensuring high precision and consistency, meeting the requirements of complex environmental applications.

The PVC Flat Reducing Coupling, Its flat, low-profile design allows for easy installation in confined spaces, offering space-saving benefits without compromising connection strength. Constructed from high-quality PVC, it delivers resistance to corrosion and aging, making it ideal for long-term use in damp or chemically aggressive environments.
With differing diameters on each end, this coupling enables a smooth transition between pipe sizes, minimizing fluid turbulence and enhancing flow efficiency. The interior is precision-smoothed to reduce friction, ensuring uninterrupted and efficient media transmission. It is widely used in agricultural irrigation, building drainage, water treatment systems, and industrial piping applications.
Designed to meet international standards, the coupling undergoes rigorous pressure testing to guarantee safety and reliability under rated operating conditions. Installation is simple and tool-free—just apply solvent cement for a secure, leak-proof joint. Its sleek, compact form makes it a alternative to traditional metal fittings.

The Type B PVC Flat Straight Coupling is designed to offer a reliable and durable connection solution for various piping systems. With a specification of D110 mm, this coupling is engineered to fit seamlessly into standard PVC systems, ensuring a tight, leak-proof seal. Made from high-quality PVC material, it is resistant to corrosion, making it ideal for both indoor and outdoor applications where long-lasting performance is required.
This coupling is for use in construction, irrigation, and other plumbing systems, offering strength and stability in environments that demand high performance. It is designed to be easy to install, reducing the time and effort needed during setup. With its flat design, the Type B PVC Flat Straight Coupling allows for straightforward, space-efficient connections.
Packaged in a carton of 60 pieces, this product provides an efficient and cost-effective solution for bulk requirements, making it an choice for suppliers and contractors looking for reliable, high-quality coupling solutions.

The design of PVC simple double drainage direct connection is very simple and practical. Its unique dual drainage function allows it to achieve diverted drainage in a single pipe connection, effectively improving drainage efficiency. The product specification is D50mm, suitable for standard 50mm diameter pipes, easy to install, no additional tools are required, and fixing can be completed by threaded connection, greatly saving construction time and cost.
In addition, the surface of the PVC simple double drainage direct connection has been finely processed and the interior is smooth and burrless, which can reduce water flow resistance, prevent blockage, and ensure smooth drainage. Its rugged and durable structural design can withstand large water pressure and temperature changes, and is suitable for use in a variety of application scenarios such as rainwater discharge and sewage transport. Each box contains 280 connectors for easy batch procurement and inventory management, making it ideal for drainage system upgrades and maintenance.

Type B PVC Straight Coupling is a high-performance PVC pipe fitting widely used in building, industrial, and municipal engineering applications for drainage, water supply, and ventilation systems. This straight coupling is made from premium polyvinyl chloride (PVC) material, offering corrosion resistance and anti-aging properties, ensuring long-term durability against various chemicals and environmental factors. Its design is simple yet robust, suitable for connecting pipes of different diameters to ensure smooth water flow.
The product comes in multiple specifications, including D50, D75, D110, and D160 millimeters, catering to diverse application requirements. The packaging quantities for each size are carefully designed, with 378 pieces for D50, 140 pieces for D75, 120 pieces for D110, and 36 pieces for D160, making it convenient for customers to purchase and store according to their needs. Additionally, the Type B PVC Straight Coupling features a smooth inner surface, reducing water flow resistance and enhancing the efficiency of the piping system. Its outer surface is finely processed, facilitating easy alignment and installation, significantly simplifying the construction process.
During use, this straight coupling effectively prevents leaks and seepage while withstanding high pressure, ensuring stable system operation. Whether for new construction projects or pipe renovation works, the Type B PVC Straight Coupling provides an ideal connection solution.

This elbow is ideal for various pipe connection scenarios, particularly suitable for applications requiring分流drainage, such as kitchens, bathrooms, or industrial drainage systems. Its unique dual-drain design effectively disperses water flow, reducing the risk of clogs and ensuring efficient operation of the drainage system.
The product has a specification of D50 millimeters, with each carton containing 180 pieces, making it convenient for bulk purchases and use. The surface is meticulously processed to be smooth and flat, facilitating easy installation and maintenance. Additionally, the PVC material provides chemical stability, capable of resisting erosion from acids and alkalis, thereby extending its service life.

Specifically designed for rainwater drainage systems. It is intended for scenarios where a reduction in pipe diameter is required. The coupling is made from high-quality PVC material, offering corrosion resistance and anti-aging properties. This ensures long-term stability and reliability, as it can effectively withstand the acidic or alkaline substances and UV radiation present in rainwater.
The product comes in four sizes: D50, D75, D110, and D160, catering to different pipe diameter requirements for various scales of rainwater drainage systems. The packaging quantities are as follows: 504 pieces per box for D50, 210 pieces per box for D75, 120 pieces per box for D110, and 60 pieces per box for D160. These quantities have been carefully considered to meet the practical needs of engineering projects, facilitating bulk procurement and construction.
The PVC material is lightweight and easy to install, with good flexibility and impact resistance, ensuring structural integrity even in complex environments. Additionally, the design complies with international standards, featuring tight joints and sealing performance to prevent leaks, ensuring smooth rainwater discharge and avoiding potential issues caused by water accumulation.
The PVC Coupling product series offers a wide variety of fittings designed to connect and secure pipe systems in both residential and industrial applications. These couplings are essential components for ensuring leak-free and efficient fluid transportation.
The series includes straight couplings, which provide a straightforward connection between two pipes. These are commonly used in simple plumbing systems where pipes need to be joined end-to-end without changes in direction.
For more complex systems, the series offers reducing couplings and decentered reducing couplings, which are ideal for joining pipes of different diameters. These fittings allow for a seamless flow transition, ensuring the system operates smoothly without interruptions.
Additionally, the PVC Coupling series includes reinforced expansion joints and straight couplings with clearances. These are used in systems where expansion or contraction of the pipework is expected due to temperature fluctuations or other external factors.
The series also features specialized fittings like the simple double-drain elbow, which is used for specific drainage applications. These couplings cater to both horizontal and vertical piping needs, offering flexibility in installation and system design.
Manufactured with high-quality PVC material, the fittings are durable, corrosion-resistant, and designed to withstand the pressure and demands of various fluid systems, whether for water, chemicals, or gas.
Shanghai Pirsa Pipe Industry Co., Ltd. was established in 2003. We have two production bases located in Shanghai, China and Zhoukou, Henan Province, with cooperative bases covering Fujian, Anhui, Yunnan, Chongqing, and Shenyang in China. The factory covers an area of 100000 square meters; Over 100 production lines with an annual production capacity of 100000 tons and an annual sales revenue of 600 million RMB.
The products include PP-R, PE-RT, PE water supply pipes PB、 Nearly a hundred series of products including stainless steel drinking water pipes, HDPE drainage pipes and double wall corrugated pipes, PVC-U drainage pipes and electrical conduit, PVC-C high and low voltage power pipes, switch sockets, bathroom plumbing, and pre purified water.
The company was established in 2003
Factory area of 100000 square meters
Over 100 production lines

