Coliter ® Compression Ring, PN16, 0–120°C, for Copper and Plastic Tubing
GJ3020 Compression Ring – Precision Brass Ferrule for Leak-Free Tubing Connections
The Coliter® GJ3020 Compression Ring is a high-precision brass ferrule engineered for use in compression-style plumbing fittings with copper or plastic tubing. It works together with a compression nut to form a reliable, watertight seal by evenly compressing against the outer surface of the pipe when tightened. Suitable for operating pressures up to PN16 (1.6 MPa) and temperatures ranging from 0°C to 120°C, it ensures durable performance in residential water supply, heating, and HVAC applications. Made from high-quality lead-free brass and manufactured to tight tolerances, the GJ3020 guarantees consistent sealing integrity and compatibility with standard ISO-compliant compression systems.
Installation diagram
Product Description
| DN | L | d | D |
| 16*16*16 | 18 | 22 | 16.5 |
| 20*20*20 | 20 | 26 | 20.5 |
| 25*25*25 | 27.5 | 32 | 25.5 |
Technical Specifications
Nominal Pressure: 1.6 MPa
Working Medium: Hot and Cold Water
Working Temperature: 0℃ ≤ t ≤ 120℃
Pipe Threads: ISO 228
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Faq - Frequent questions
Introduction to Compression Ring
Coliter®’s compression rings (GJ3020) are precision-engineered brass ferrules designed to create secure, leak-free seals in compression-type plumbing fittings for copper and plastic tubing. Made from high-quality lead-free brass, these rings work with standard compression nuts to provide reliable radial compression against the pipe surface—ensuring long-term sealing performance under PN16 (1.6 MPa) pressure and temperatures up to 120°C. Ideal for residential water supply lines, radiator connections, and HVAC installations where soldering is impractical. Compatible with ISO-compliant compression systems and backed by strict quality control for consistent performance in potable water applications.
