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PPR Coupling NSF & WATERMARK Certified Pipe Fittings Factory
– NSF & WRAS & WATERMARK Certified
– DVGW & DIN & TCVN & ISO Certified
Features
A PPR (Polypropylene Random Copolymer) coupling is a type of PPR pipe fitting used to quickly connect two PPR pipes of the same or different diameters to form a leak-proof and durable connection in hot and cold water transportation. Typically used in residential or commercial piping systems, it involves heat fusion welding to create a permanent, corrosion-resistant piping system.
• Operating temperature ranges from 3 ℃ to 95 ℃, widely adaptable to both cold and hot water supply needs.
• Certification and compliance. Ctube PPR coupling comply with NSF, WRAS, DVGW, DIN, TCVN and ISO requirements.
• Excellent hydrophobicity. Patented technology improves hydrophobicity efficiency by 10%-15%, making it the smart choice for builders and contractors.
• Non-toxic and Corrosion-Resistant. PPR material is non-toxic and additive-free, and is corrosion- and rust-resistant with a service life of over 50 years.
Product Details
Multi-Certified & High Quality
Certified by NSF, WRAS, DVGW, DIN, TCVN and ISO. Compatible with standards in North America, Europe and Southeast Asia, ensuring your product can be installed smoothly.
Excellent Temperature Range
Excellent temperature range. Minimum operating temperature is 3°C (37.400°F), maximum continuous operating temperature reaches 70°C (158.00°F), and peak operating temperature reaches 90°C (194.00°F). Fully meets the requirements for cold and hot water delivery, ensuring long-term stable operation.
Highly Effective Hydrophobic
The Ctube® series PPR pipes utilize a proprietary patented technology to enhance hydrophobicity, allowing for smoother water flow. Real-world testing has shown that it can increase water flow speed by 10-15%, resulting in smoother water flow.
Non-toxic & Corrosion-Resistant
Made with 100% new raw materials and free of heavy metals, it is non-toxic and odorless, ensuring safe drinking water. The PPR material is corrosion-resistant, guaranteeing a service life of over 50 years, and is recyclable, reducing waste and pollution.
Performance Data Sheet
| Material | PPR (Random Polypropylene) |
| Size | DN16 to DN160 (16mm to 160mm) |
| Type | Pipe Coupling |
| Brand Name | Ctube |
| Colors | Green, Orange |
| Application | Cold and Hot Water Supply |
| Standard | NSF/ANSI/CAN 61, ISO 15874,EN ISO,DIN 8077, DIN 8078,WRAS, DVWG, WaterMark, GB/T |
| Pressure Rating | 1.25MPa, 1.6MPa, 2.0MPa, 2.5MPa, |
| Density | 23°Cg/cm3 |
| Melting Flow Index MFI | 190°C, 5 kg, 230°C, 2,16 kg, 230°C, 5 kg |
| Tensile Stress | 23°C, 50 mm/dk, 50 mm/min. ≥20Mpa |
| Working Temperature | 70℃ (Sustained) to 95℃ (Transient) |
| Specific Gravity | 0.89-0.91 (20°C) |
| Modulus of Elasticity | 800 N/mm2 (20°C) |
| Thermal Conductivity | 0.23-0.24 w/(m-k) (20°C) |
| Coefficient of Linear Expansion | 0.14-0.16 mm/(m.k) |
| Longitudinal Reversion | ≤2% (135°C, 2h) |
| Place of Origin | Guangdong, China |
| Shipping | By sea |
| Samples | Available |
| Customized Services | Available |
PPR Stop Valve Size Chart
| Item No. | dn (mm) | L(mm) | PCS/CTN |
| CTPPRCA | 20 | 31.0 | 870 |
| CTPPRCB | 25 | 33.5 | 520 |
| CTPPRCC | 32 | 37.5 | 300 |
| CTPPRCD | 40 | 42.0 | 260 |
| CTPPRCE | 50 | 46.5 | 210 |
PPR Pipe Technical Specification Chart (DIN 8077/8078)
| Outer Diameter | PN 10 (SDR 11) | PN 12.5 (SDR 9) | PN 16 (SDR 7.4) | PN 20 (SDR 6) | PN 25 (SDR 5) |
| Applications | Cold Water | Cold water/Low Pressure | Hot & Cold Water | High-pressure Hot Water/Heating | Special High Voltage Projects |
| (mm) | T (mm) | T (mm) | T (mm) | T (mm) | T (mm) |
| 20 | 1.9 | 2.3 | 2.8 | 3.4 | 4.1 |
| 25 | 2.3 | 2.8 | 3.5 | 4.2 | 5.1 |
| 32 | 2.9 | 3.6 | 4.4 | 5.4 | 6.5 |
| 40 | 3.7 | 4.5 | 5.5 | 6.7 | 8.1 |
| 50 | 4.6 | 5.6 | 6.9 | 8.3 | 10.1 |
| 63 | 5.8 | 7.1 | 8.6 | 10.5 | 12.7 |
| 75 | 6.8 | 8.4 | 10.3 | 12.5 | 15.1 |
| 90 | 8.2 | 10.1 | 12.3 | 15 | 18.1 |
| 110 | 10 | 12.3 | 15.1 | 18.3 | 22.1 |
| 160 | 14.6 | 17.9 | 21.9 | 26.6 | 32.1 |
Notes:
SDR = D/S
D means Outer Diameter，S means Wall Thickness
Applications
- Residential Building;
- Commercial Building;
- Shopping Mall;
- Industry Plants;
- Hospital;
- Schools;
- Hotels;
- Laboratories and Chemical.
FAQ
Are your couplings rated for high-pressure commercial systems (PN20 / PN25)?
Yes, all our standard PPR couplings are engineered with a PN25 pressure rating. We maintain a heavily reinforced, uniform wall thickness throughout the entire fitting. This structural integrity ensures the coupling can easily withstand the high pressure and water hammer effects common in commercial high-rise buildings and industrial booster pump networks.
Do you use any recycled regrind material to lower the cost of basic fittings like couplings?
Absolutely not. We operate under a strict zero-regrind policy. Even for high-volume basic fittings like couplings, we use 100% virgin PPR-C material sourced from industry leaders like Borealis or Hyosung. This ensures the fittings remain highly impact-resistant, non-toxic, and fully certified for potable (drinking) water systems without becoming brittle over time.
How do you prevent thread stripping in your Female/Male Threaded Couplings (Transition Sockets)?
For threaded transition couplings, we utilize heavily knurled CW617N brass inserts. During the injection molding process, the PPR material flows into the deep anti-slip grooves of the brass, creating an inseparable mechanical lock. This prevents the brass insert from twisting, stripping, or leaking when contractors apply high torque during installation.
How do you handle packaging to prevent "ovality" (deformation) during long ocean freight?
Couplings packed loosely in large sacks often suffer from ovality (becoming out-of-round) under the immense weight of a stacked 40HQ container. We solve this by packing our couplings in heavy-duty polybags, which are then placed into reinforced 5-ply corrugated export cartons. This rigid packaging structure absorbs the physical stress of international shipping, ensuring every coupling arrives perfectly round and ready for fusion.
Can we emboss our own brand logo and insertion depth lines on the couplings?
Yes, we provide comprehensive OEM services for global distributors. We can customize the injection molds to feature your embossed brand logo, the exact pressure rating (e.g., PN25), and standard compliance marks. Additionally, we can include visible insertion depth indicators on the coupling exterior to help your contractors achieve a perfect, standardized weld every time.
Is there any variation in quality or wall thickness across massive bulk orders?
To guarantee absolute consistency across massive batches, our production lines utilize fully automated injection molding machines with advanced hot runner systems. Every batch is subjected to random ultrasonic wall-thickness testing and hydrostatic burst tests. We guarantee that the millionth coupling is identical in quality and performance to the very first one.
What is the standard lifespan of your couplings in aggressive water environments?
When installed correctly at standard operating parameters (20°C / PN10), our virgin PPR couplings have a design life exceeding 50 years. Because the material is exceptionally smooth and chemically inert, it is completely immune to galvanic corrosion, rust, and the severe hard-water scaling that frequently destroys traditional metal couplings.
Product Certifications
Why Ctube
Ctube is a professional plumbing & electrical pipe and fittings manufacturer with over 10 years of experience, focusing on PVC, PPR, PERT, LSZH pipes OEM/ODM service for leading brands worldwide. We aim to become the leading global supplier in our industry and specialize in developing and manufacturing high-quality, user-friendly plastic pipes and fittings.
10+ Years of Experience
10+ years of plastic pipe industry experience offer a full range of conduit pipe product choices
Full Certifications
ISO 9001 Quality System Certification. ISO 14001 Environmental Management System Certification SGS, ROSH, CNAS, CE, IEC Certification
All Customer Served
Have experience working with both end-user and trading companies, Understand the difference between clients and users.
Customization Solution
We can customize various details of your product, including materials, colors, size, printing, and the rest.
Related Products
Ctube not only provides PPR pipes, but also offers a full range of accessories to help you install quickly, saving you time and money.
PPR Pipe
Ctube PPR Pipe is NSF, WRAS, and WATERMARK certified and can be used in hot and cold water supply, sanitary systems, etc.
PPR Tee
PPR tees are used to split or connect three water pipes, typically with two pipes connected in a straight line and the third pipe connected at a 90° angle.
Ball Valves
PPR ball valves are used for precise and reliable regulation of hot and cold water flow and control of liquid flow.
Stop Valve
PPR Stop Valve is designed for PPR pipes and is used for precise and reliable regulation of water flow and control of liquid flow.
The Contractor Choice of PPR Pipe & Fittings Manufacturer
Ctube focuses on the plastic pipe and fittings, around the customer’s demand for products, technology and services.
We always take additional measures to make our customers satisfied with the quality, efficiency and marketability of our products. With high quality and a wide range of products, we have established long-term cooperation with many customers from different areas of the world.