About Us

Changzhou Zhongjia Plastic Industry Co., Ltd.

Changzhou Zhongjia Plastic Industry Co., Ltd. was established in 2006. It is an enterprise specializing in the research, development, production and sales of UPVC, CPVC plastic pipe fittings and valve products. As China PVC-U End Cap Fitting Manufacturers and Custom PVC-U End Cap Fitting Suppliers. Our featured products are plastic products such as UPVC/CPVC pipes, pipe fittings and valves. At present, we mainly supply industrial and water supply series pipes, pipe fittings and valves that meet national standards, American standards. Our products are sold to Southeast Asia, the Middle East, Africa, North America, South America, and are widely used in industry, agriculture, construction and other fields.
Our company is located in the Xueshuxiang Industrial Concentration Zone, Yaoguan Town, Wujin District, Changzhou City, Jiangsu Province. The area is close to the Shanghai-Chengdu Expressway for 10 kilometers, the Yangtze River Expressway for 15 kilometers, the Changzhou High-speed Railway Station for 15 kilometers, and Shanghai for 160 kilometers. It has convenient transportation and environment.
The company covers an area of 50,000 square meters and has an annual production capacity of more than 30,000 tons. The company has passed ISO9001, ISO14001, and OHSAS18001 system certification. It has 4 raw material mixers, 60 plastic injection molding machines, 8 pipe extrusion production lines, 10 mechanical processing equipment, and more than 3,000 sets of molds. At present, we have 150 employees, including 10 technicians. With the continuous development and increasing internationalization of the company, we are committed to attracting talents and preparing for vigorous development.
The company adheres to the market-oriented, quality-oriented, service-oriented, introduces advanced production equipment and technology, makes products, creates brands, and has won the trust and recognition of customers. It has now become one of the green and vital pipeline production enterprises at home and abroad. We will always focus on customer satisfaction, follow the business principles of "modernization, youth, and knowledge", strive to catch up with the advanced level of the same industry at home and abroad, and strive to create a Chinese brand.
We sincerely welcome domestic and foreign customers to our company to discuss cooperation!

Certificate Of Honor

News

What Is a PVC-U Spigot Flange and How Do You Select the Right One for Your Piping System?

May 21,2026

Understanding the PVC-U Spigot Flange A PVC-U spigot flange is a pipe fitting that combines a plain-ended spigot — a smooth, cylindrical stub of pipe with a defined outer diameter — with a flat circular flange face, allo...

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How Do You Select and Install a PVC-U Female Adapter Correctly in Your Piping System?

May 12,2026

A PVC-U female adapter is one of the most frequently used fittings in residential, commercial, and industrial piping systems. Its primary function is to create a reliable threaded connection between a plain-end PVC-U pip...

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Industrial PVC-U Pipes: Properties, Standards, and Applications

May 07,2026

What Are Industrial PVC-U Pipes and How Are They Made? Industrial PVC-U pipes are rigid thermoplastic pipes manufactured from unplasticized polyvinyl chloride, a form of PVC that contains no plasticizing additives. The a...

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PVC-U End Cap Industry knowledge

PVC-U End Cap Fitting – Reliable Pipeline Termination Solution

In any piping system, proper termination is just as crucial as the pipeline itself. Zhongjia's PVC-U End Cap Fittings provide a secure, durable, and cost-effective solution for sealing the ends of pipes in various applications. Manufactured from high-quality unplasticized polyvinyl chloride (PVC-U), these end caps ensure leak-proof termination while offering excellent resistance to corrosion, chemicals, and pressure.

Features & Benefits
1. Secure Pipeline Termination
Leak-Proof Seal: The socket design allows for a tight, permanent bond when solvent-welded to PVC pipes.

Pressure Resistance: Rated for PN10 and PN16, making them suitable for both low and medium-pressure systems.

2. Corrosion & Chemical Resistance
No Rust or Degradation: Unlike metal caps, PVC-U end caps will not corrode, even in humid or chemically aggressive environments.

Resistant to Acids, Alkalis, and Salts: Ideal for industrial and chemical applications.

3. Smooth Interior Surface
Prevents Sediment Buildup: The smooth inner surface minimizes turbulence and avoids clogging in water and drainage systems.

4. Lightweight & Easy to Install
Simple Socket Connection: Easily installed using PVC solvent cement, requiring no specialized tools.

Lower Handling Costs: Lightweight design reduces transportation and labor expenses compared to metal alternatives.

5. Long Service Life & Minimal Maintenance
UV-Resistant (when coated): Suitable for outdoor applications.

Abrasion-Resistant: Durable even in abrasive fluid transport systems.

50+ Years Lifespan: Requires no maintenance once properly installed.

6. Compliance with DIN Standards
Quality Assurance: Manufactured according to DIN standards, ensuring reliability and safety in demanding applications.

Applications of PVC-U End Caps
1. Plumbing & Water Supply Systems
Sealing unused pipe ends in residential and commercial buildings.

Temporary or permanent termination in water distribution networks.

2. Industrial & Chemical Pipelines
Closing off sections of chemical transport lines during maintenance.

Protecting pipe ends in compressed air and cooling systems.

3. Agricultural & Irrigation Systems
Sealing drip irrigation lines or sprinkler system endpoints.

Preventing debris entry in exposed agricultural pipelines.

4. Drainage & Sewage Systems
Terminating stormwater or wastewater pipes during construction.

Blocking off unused sections in sewage treatment plants.

Why Choose Zhongjia’s PVC-U End Caps?
Wide Size Range (DN15 to DN400): Fits almost any PVC piping system.

High Pressure Ratings (PN10 & PN16): Safe for both low and medium-pressure applications.

Chemical & Corrosion Resistance: Long-lasting performance in harsh conditions.

Cost-Effective: More affordable than metal caps with lower installation costs.

Eco-Friendly: PVC-U is recyclable and has a smaller environmental footprint than metal.

Installation Guidelines
Cut the Pipe Cleanly: Ensure a smooth, square-cut edge for proper fitting.

Clean & Prime: Use PVC cleaner and primer to prepare the surfaces.

Apply Solvent Cement: Coat both the pipe end and the inside of the cap evenly.

Push & Hold: Insert the pipe into the cap and hold firmly for 15-30 seconds.

Cure Time: Allow at least 24 hours before pressurizing the system.

Maintenance & Safety Tips
Inspect Periodically: Check for cracks or damage in exposed installations.

Use Proper Solvent Cement: Ensure compatibility with PVC-U materials.

Avoid Direct Sunlight: For long-term outdoor use, consider UV-resistant paint or protective sleeves.

Zhongjia's PVC-U End Cap Fittings provide a reliable, durable, and cost-efficient solution for terminating PVC pipelines across various industries. Their chemical resistance, pressure durability, and easy installation make them indispensable for plumbing, industrial, agricultural, and drainage systems.