PE Tube Tee 20mm: A Comprehensive Guide


Polyethylene (PE) tube tees are essential components in various piping systems, particularly in applications requiring reliable and efficient fluid distribution. The 20mm PE tube tee, specifically, plays a critical role in small to medium-sized piping systems. This article delves into the properties, applications, installation procedures, advantages, and maintenance practices associated with 20mm PE tube tees, providing a detailed understanding for both professionals and enthusiasts in the field.

Understanding PE Tube Tees

What is a PE Tube Tee?

A PE tube tee is a type of fitting used in piping systems to split or combine fluid flow. It is called a “tee” because of its T-shaped design, which allows three pipes to connect at right angles. Made from polyethylene, these fittings are known for their flexibility, durability, and resistance to various environmental factors.

Specifications of 20mm PE Tube Tee

  • Diameter: 20mm
  • Material: Polyethylene (PE)
  • Connection Type: Push-fit, compression, or weld
  • Pressure Rating: Varies, typically up to 16 bar
  • Temperature Range: Usually from -40°C to 60°C
  • Standards: ISO 4427, DIN 8074/8075, AS/NZS 4130

Properties of Polyethylene

Polyethylene is a versatile thermoplastic polymer with several key properties making it suitable for tube tees:

  • Chemical Resistance: Resistant to many chemicals, making it ideal for various industrial applications.
  • Flexibility: Allows for easy installation and handling.
  • Durability: High impact resistance and long service life.
  • Low Friction: Smooth interior surface reduces pressure drops and prevents buildup.

Applications of 20mm PE Tube Tee

Residential Plumbing

In residential plumbing, 20mm PE tube tees are commonly used for:

  • Water Supply Systems: Distributing potable water from main lines to different parts of a house.
  • Irrigation Systems: Connecting and distributing water to various sections of a garden or lawn.

Agricultural Irrigation

In agriculture, these fittings are crucial for:

  • Drip Irrigation Systems: Ensuring even water distribution to crops.
  • Sprinkler Systems: Connecting different segments of the irrigation network.

Industrial Applications

In industrial settings, 20mm PE tube tees are used for:

  • Chemical Transport: Handling and distribution of chemicals in manufacturing processes.
  • Cooling Systems: Circulating coolants in machinery and equipment.

Municipal Infrastructure

Municipal uses include:

  • Water Distribution Networks: Part of the larger network of pipes distributing water throughout cities.
  • Wastewater Management: Connecting different sections of wastewater treatment systems.

Installation Procedures

Tools and Equipment

Before installation, gather the necessary tools:

  • Pipe cutter
  • Deburring tool
  • Marker
  • PE welding machine (if required)
  • Compression or push-fit fittings

Installation Steps

1. Cutting the Pipe

  • Measure and mark the pipe where it needs to be cut.
  • Use a pipe cutter to ensure a clean, straight cut.

2. Deburring

  • Deburr the inside and outside of the cut ends to ensure a smooth fit and prevent damage to the O-rings.

3. Fitting the Tee

Push-Fit Method:

  • Insert the pipe ends into the tee until they reach the stops inside the fitting.
  • Ensure the pipe is fully inserted by marking the insertion depth on the pipe.

Compression Method:

  • Slide the compression nut and ring onto the pipe.
  • Insert the pipe into the tee and tighten the nut to create a seal.

Welding Method:

  • Use a PE welding machine to heat and fuse the pipe ends with the tee.
  • Allow the joint to cool and solidify before testing.

Testing the System

After installation, test the system for leaks by:

  • Pressurizing the system to the operating pressure.
  • Checking all joints for any signs of leakage.

Advantages of 20mm PE Tube Tees

Durability and Longevity

PE tube tees are known for their long service life, often exceeding 50 years under normal operating conditions. Their resistance to corrosion, chemicals, and UV radiation ensures minimal maintenance and replacement costs.


Polyethylene fittings are generally more affordable than metal counterparts, both in terms of material costs and installation expenses. The ease of installation further reduces labor costs.

Environmental Impact

PE is a recyclable material, and its production has a lower environmental footprint compared to metals. Additionally, the smooth interior surface of PE pipes and fittings reduces energy consumption by minimising friction losses in fluid flow.

Flexibility and Adaptability

The flexibility of PE allows it to withstand ground movements and vibrations without cracking, making it ideal for areas prone to seismic activity. Its adaptability to various connection methods also simplifies integration into existing systems.

Maintenance and Troubleshooting

Routine Inspection

Regular inspection of the piping system can help identify potential issues early. Look for signs of wear, corrosion, or damage at the joints and fittings.

Cleaning and Flushing

Periodic cleaning and flushing of the system can prevent buildup and blockages. Ensure that the cleaning agents used are compatible with polyethylene.

Repair Procedures

In case of damage or leaks, the affected section can be cut out and replaced with new PE tube tees. For minor leaks at joints, tightening the fittings or replacing O-rings can often resolve the issue.


What is a 20mm PE tube tee, and how is it used in irrigation?

A 20mm PE tube tee is a T-shaped fitting made of polyethylene designed to connect three sections of 20mm diameter irrigation pipes. It is used to split or combine water flow in irrigation systems, helping distribute water efficiently to different areas.

Why is polyethylene (PE) preferred for irrigation fittings like tube tees?

Polyethylene is preferred due to its flexibility, durability, chemical resistance, and ease of installation. These properties make it ideal for withstanding the demands of irrigation systems, including exposure to sunlight, chemicals, and varying water pressures.

What are the pressure ratings for 20mm PE tube tees in irrigation systems?

The pressure rating can vary, but typically, 20mm PE tube tees used in irrigation systems can handle pressures up to 16 bar. However, it’s essential to check the manufacturer’s specifications for exact ratings.

Can 20mm PE tube tees handle the temperatures typical in irrigation environments?

Yes, 20mm PE tube tees can handle temperatures from -40°C to 60°C, which covers the range of most irrigation environments, from cold winters to hot summers.

How do you install a 20mm PE tube tee using the push-fit method in an irrigation system?

  1. Cut the Pipe: Measure and cut the irrigation pipe to the desired length using a pipe cutter.
  2. Deburr the Pipe: Smooth the cut ends with a deburring tool to prevent damage to the fitting.
  3. Insert the Pipe: Push the pipe ends into the tee until they reach the internal stops.


The 20mm PE tube tee is a vital component in various piping systems, offering numerous benefits such as durability, cost-effectiveness, and ease of installation. Its applications range from residential plumbing and agricultural irrigation to industrial processes and municipal infrastructure. Understanding the properties, installation procedures, and maintenance practices associated with PE tube tees can ensure the efficiency and longevity of piping systems, making them a preferred choice in many sectors.

By leveraging the advantages of polyethylene and following best practices for installation and maintenance, users can achieve reliable and efficient fluid distribution systems. Whether for a small garden irrigation setup or a large municipal water network, the 20mm PE tube tee stands out as a dependable and versatile solution.