The Advantages of Compression Fittings: A Comprehensive Guide

Compression fittings are a staple in plumbing, heating, and gas installations due to their versatility, ease of use, and reliability. They are designed to create secure, leak-proof connections without the need for heat or solder, making them an excellent choice for both professionals and DIY enthusiasts. This guide explores the key benefits of compression fittings, explaining why they are a popular choice across various applications.

What Is A Compression Connection?

A compression joint creates a secure, yet demountable, seal by compressing an olive (inner-ring) against a pipe. The joint consists of three main components: a compression nut, an olive, and the fitting body. When the nut is tightened, it compresses the olive against the pipe, forming a seal that prevents leaks and holds the connection firmly in place, allowing a smooth flow of liquids or gases.

Where Are Compression Fittings Used?

Compression Fittings are versatile and used across numerous industries to connect tubes or pipes of various materials. Being demountable, they are an easy choice for systems that need to be maintained regularly.

They are commonly found in:

• Automotive sector

• Domestic and Commercial HVAC systems

• Oil & Gas

• Low-pressure gas installations

• Various industrial services

What Types of Compression Fittings Are there?

Normal compression Fittings

Normal Compression Fittings, sized from 8mm to 54mm, are made from brass and designed to connect multiple types of pipe, including copper, plastic, and steel. Easy to install with basic tools, these Compression Fittings are ideal for both domestic and commercial applications, offering versatility and the ability to disassemble and reuse for adjustments or repairs.

PEX compression Fittings

Compression PEX Fittings, typically sized from 16mm, are designed specifically for use with PEX (cross-linked polyethylene) Pipes. Made from brass, these fittings create a watertight seal by inserting a spigot inside the PEX pipe and using a split ring olive to bite into the outer wall of the pipe. Ideal for plumbing, heating, underfloor heating and potable water systems, they provide a reliable, flame-free connection without the need for special tools or heating.

Large compression Fittings

Large Industrial Compression Fittings joined by flanges are specifically designed for heavy-duty applications in industrial settings. These fittings are made from Bronze for robust connections between pipes. They are designed to connect by compressing the joint between flanged ends using bolts and gaskets, providing exceptional strength and a secure, leak-proof seal. They are easy to assemble and disassemble, flanged compression fittings are ideal for large-scale systems that require frequent maintenance or modifications.

What Are The Advantages Of Compression Fittings?

Considerations

Over-tightening

Over-tightening can damage the olive or pipe. Tighten until the nut stops with reasonable force, and avoid turning further.

Stress Corrosion Cracking (SCC)

SCC can occur in brass components exposed to tensile stresses and corrosive environments, often due to over-tightening or contamination. Proper installation practices prevent SCC; read more in our article on SCC for detailed guidance.

Conclusion

For a quick, cost-effective, and reliable connection, compression fittings are unbeatable. If you want to learn more about compression fittings or need assistance, explore our product range or contact us directly for support.