EN
PVC Union
Raw Material: PVC resin
Standards: DIN, ASTM, Sch 80/40, JIS, BS, D1785, ISO 1452
Size: DN15mm – DN100mm (customizable)
- Overview
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Product Introduction
Baishunxing Pipe Industry The PVC Union is the ideal fitting for quick disassembly and maintenance within a piping system. It consists of three parts: two threaded hubs and a union nut, with a high-grade internal sealing ring. Using a union allows you to easily remove pumps, valves, or filters for cleaning and repair without the need to cut the pipes. This fitting is an indispensable component wherever equipment requires periodic servicing. Unlike permanent solvent-welded joints that must be cut apart for access, the PVC union can be opened and resealed repeatedly using only hand tools. The union nut compresses the two hubs together against an internal sealing ring, creating a leak-tight mechanical joint that remains fully removable. The two threaded hubs are solvent-welded or threaded onto the pipe ends on either side of the equipment. When maintenance is needed, simply loosen the central union nut and separate the two halves. After servicing, re-tighten the nut and the system returns to service with no cutting, no replacement fittings, and no material waste. Manufactured from premium UPVC (unplasticized polyvinyl chloride), our PVC union offers excellent acid and alkali resistance, making it suitable for both corrosive industrial media and drinking water systems. The material is 100% lead-free and safe for potable water applications. Available in various sizes to match standard PVC pipe dimensions, the union provides installation flexibility and long-term cost savings for any piping system requiring regular access to pumps, valves, filters, or other inline equipment.
Product Parameters
| Raw Material | PVC resin |
| Standards | DIN, ASTM, Sch 80/40, JIS, BS, D1785, ISO 1452 |
| Size | DN15mm – DN100mm (customizable) |
| Pressure Rating | PN8, PN10, PN16, PN20 |
Key Features
The core features of our PVC union cover true disconnect design, double-way sealing guarantee, high-strength injection molding, and wide chemical compatibility.
True Disconnect Design – Simply loosen the central union nut to disconnect the line. No pipe cutting, no heat application, and no special tools are required. This design makes the union an essential component for pumps and filters that require regular cleaning or replacement. The nut can be hand-tightened or given a final snug with standard pliers.
Double-Way Sealing Guarantee – The union is equipped with high-elasticity EPDM or FKM (Viton) O-rings. These sealing rings provide compression from both sides of the joint, ensuring a perfect double-way seal even under low pressure conditions. The resilient O-ring material conforms to any minor surface irregularities, preventing any fluid leakage regardless of pressure fluctuations or thermal cycling. EPDM is standard for water and mild chemicals, while FKM (Viton) is available for aggressive fluids and higher temperatures.
High-Strength Injection Molding – Our PVC union features a thick-wall design and reinforced threads. This robust construction allows the fitting to withstand mechanical stress from repeated disassembly and reassembly over many maintenance cycles. The reinforced threads resist stripping and cross-threading, while the thick walls provide high ring stiffness for maintaining seal compression under pressure.
Wide Chemical Compatibility – The union is manufactured from premium UPVC polyvinyl chloride with excellent acid and alkali resistance. This makes it suitable for corrosive industrial media including many acids, bases, salt solutions, and oxidizing agents. At the same time, the lead-free formulation is safe for drinking water systems.
True Disconnect Design – Simply loosen the central union nut to disconnect the line. No pipe cutting, no heat application, and no special tools are required. This design makes the union an essential component for pumps and filters that require regular cleaning or replacement. The nut can be hand-tightened or given a final snug with standard pliers.
Double-Way Sealing Guarantee – The union is equipped with high-elasticity EPDM or FKM (Viton) O-rings. These sealing rings provide compression from both sides of the joint, ensuring a perfect double-way seal even under low pressure conditions. The resilient O-ring material conforms to any minor surface irregularities, preventing any fluid leakage regardless of pressure fluctuations or thermal cycling. EPDM is standard for water and mild chemicals, while FKM (Viton) is available for aggressive fluids and higher temperatures.
High-Strength Injection Molding – Our PVC union features a thick-wall design and reinforced threads. This robust construction allows the fitting to withstand mechanical stress from repeated disassembly and reassembly over many maintenance cycles. The reinforced threads resist stripping and cross-threading, while the thick walls provide high ring stiffness for maintaining seal compression under pressure.
Wide Chemical Compatibility – The union is manufactured from premium UPVC polyvinyl chloride with excellent acid and alkali resistance. This makes it suitable for corrosive industrial media including many acids, bases, salt solutions, and oxidizing agents. At the same time, the lead-free formulation is safe for drinking water systems.
Product Advantages
The product advantages of our PVC union focus on installation flexibility, 100% air-tight testing, long-term cost savings, and advanced manufacturing.
Installation Flexibility – The union provides easy installation without heavy equipment, making it perfect for confined spaces or pipelines that require frequent adjustments. A technician can install the union in a cramped valve pit or pump house using only basic hand tools. The two-piece design allows final alignment after the pipes are already in place.
100% Air-Tight Testing – Every PVC union undergoes rigorous pressure and leakage testing before leaving the factory. This ensures each fitting is ready for immediate use upon arrival at the job site. The testing validates both the sealing ring performance and the structural integrity of the molded components.
Long-Term Cost Savings – The union eliminates the need for pipe re-cutting and material waste during maintenance. Without a union, accessing a pump or valve requires cutting the pipe, removing the damaged section, and installing two new couplings plus a replacement spool piece. With a union, you simply loosen the nut, service the equipment, and re-tighten. This significantly reduces downtime, spare parts inventory, and labor costs over the life of the system.
Advanced Manufacturing – Our PVC union is produced on the latest automated precision injection machines. This ensures smooth thread engagement and effortless locking of the union nut. Consistent thread profiles mean every nut turns freely without binding, and every O-ring groove maintains proper dimensions for reliable sealing. Additional advantages include complete corrosion immunity, no rust contamination of the fluid stream, and lightweight handling. The union nut does not require lubrication or periodic adjustment. The sealing ring can be replaced if ever needed, extending the fitting’s service life beyond 50 years. For maintenance managers, the PVC union means faster repairs and lower consumable costs. For plant operators, it means reliable access to critical equipment without disrupting the entire pipeline network.
Installation Flexibility – The union provides easy installation without heavy equipment, making it perfect for confined spaces or pipelines that require frequent adjustments. A technician can install the union in a cramped valve pit or pump house using only basic hand tools. The two-piece design allows final alignment after the pipes are already in place.
100% Air-Tight Testing – Every PVC union undergoes rigorous pressure and leakage testing before leaving the factory. This ensures each fitting is ready for immediate use upon arrival at the job site. The testing validates both the sealing ring performance and the structural integrity of the molded components.
Long-Term Cost Savings – The union eliminates the need for pipe re-cutting and material waste during maintenance. Without a union, accessing a pump or valve requires cutting the pipe, removing the damaged section, and installing two new couplings plus a replacement spool piece. With a union, you simply loosen the nut, service the equipment, and re-tighten. This significantly reduces downtime, spare parts inventory, and labor costs over the life of the system.
Advanced Manufacturing – Our PVC union is produced on the latest automated precision injection machines. This ensures smooth thread engagement and effortless locking of the union nut. Consistent thread profiles mean every nut turns freely without binding, and every O-ring groove maintains proper dimensions for reliable sealing. Additional advantages include complete corrosion immunity, no rust contamination of the fluid stream, and lightweight handling. The union nut does not require lubrication or periodic adjustment. The sealing ring can be replaced if ever needed, extending the fitting’s service life beyond 50 years. For maintenance managers, the PVC union means faster repairs and lower consumable costs. For plant operators, it means reliable access to critical equipment without disrupting the entire pipeline network.
Typical Applications
The typical applications of our PVC union span pump stations and filtration, pools and spas, and chemical plants.
Pump Stations & Filtration – The union is used for connecting equipment that requires regular maintenance, such as pumps and filters. Water treatment facilities, irrigation pump houses, and industrial filtration skids all use unions to enable quick equipment removal.
Pools & Spas – Pool and spa systems require quick connection and disconnection between equipment like circulation pumps, heaters, salt chlorine generators, and cartridge filters. The PVC union allows seasonal servicing and winterization without cutting the PVC plumbing.
Chemical Plants – Industrial chemical facilities use unions for modular connections on corrosive liquid pipelines. When a valve or instrument needs calibration or replacement, the union provides quick access without shutting down entire process trains. Additional applications include aquaculture systems, food processing lines, and HVAC makeup water connections. The PVC union delivers reliable, removable connections wherever polyvinyl chloride piping meets maintainable equipment.
Pump Stations & Filtration – The union is used for connecting equipment that requires regular maintenance, such as pumps and filters. Water treatment facilities, irrigation pump houses, and industrial filtration skids all use unions to enable quick equipment removal.
Pools & Spas – Pool and spa systems require quick connection and disconnection between equipment like circulation pumps, heaters, salt chlorine generators, and cartridge filters. The PVC union allows seasonal servicing and winterization without cutting the PVC plumbing.
Chemical Plants – Industrial chemical facilities use unions for modular connections on corrosive liquid pipelines. When a valve or instrument needs calibration or replacement, the union provides quick access without shutting down entire process trains. Additional applications include aquaculture systems, food processing lines, and HVAC makeup water connections. The PVC union delivers reliable, removable connections wherever polyvinyl chloride piping meets maintainable equipment.
