LLDPE Tube
– PE Range
– Specifications

All our technical information for our LLDPE Tubing can be found here.

LLDPE Tube – PE Range

Style and Description

Strong Yet Flexible

The John Guest PE Range of plastic tubing is produced in Linear Low Density Polyethylene for cold and intermittent hot water applications.

Our LLDPE tubing provides the benefits of a wide range of temperature and pressure suitability, broad chemical compatibility, and is made from non contaminating materials. Common applications being water purification, water conditioners, ice makers and misting systems. LLDPE is more robust than traditional low or medium density polyethylene and is recommended for use with cold and intermittent hot water.

Our tubing is made from FDA approved materials and is NSF International certified.

John Guest Polyethylene tubing is designed for use with John Guest Speedfit Push-to-connect fittings, John Guest Shut-Off Valves, and virtually all standard tubing connectors.

Maximum Working Pressure (kPa)
      Tube OD             Tube ID       Maxmimum Pressure & Temperature
1/4″ 0.170″ 1600kPa at 20°C / 800kPa at 65°C
5/16″ 0.187″
3/8″ 0.25″
4mm 2.5mm
6mm 4mm
10mm 7mm
1/2″ 0.375″ 1000kPa at 20°C / 600kPa at 65°C
8mm 6mm
12mm 9mm
15mm 11.5mm

Maximum Working Temperature 65°C at pressures shown in the chart above.

The above maximum temperatures and pressures do not take chlorine content into account. This could reduce service life. Please note maximum pressure rating for a system depends on the lowest rated component, eg. most John Guest fittings have a different rating from the tube ratings shown above.

Burst pressures are approximately 3 times the maximum working pressure.

Applications & Resistances

Potable Water Applications

John Guest LLDPE tubing is suitable for potable cold water applications with a maximum chlorine content of 4 parts per million (4ppm). Heating water above 20°C and/or pressures above the maximum will significantly reduce service life. Direct exposure to sunlight will also significantly reduce its useful service. As part of good practice, tubing should be inspected regularly. If there is any evidence of damage, hardening or cracking, it should be replaced immediately.

UV Resistance

Only black LLDPE tube should be installed in areas exposed to any light if biofilm growth is considered an issue. In this case, any other coloured tube must be protected from light exposure. Black LLDPE tube is also UV stabilised and can be installed where exposed to direct or indirect sunlight (UV).

Chemical Resistance

For use of LLDPE tube with chemicals or potentially aggressive liquids, please refer to our Customer Service Department. When using cleaning agents or other potentially aggressive liquids, please ensure compatibility with tubing and fittings. LLDPE is not recommended for mineral oils, gases and fuels or high pressure compressed air/pneumatic systems.

Pneumatic Applications

John Guest LLDPE tube is suitable for pneumatic applications providing pressure is maximum 1000kPa @ 20°C. At elevated temperatures (50°C+) mineral oil will degrade LLDPE tube and, therefore, LLDPE tube used in pneumatic circuits should be periodically checked and replaced if necessary.

Tube Inserts

If the LLDPE tube is used in a warm water system a tube insert is necessary.

Tolerances & Minimum Bend Radii

LLDPE Tube Tolerances
TUBE OD TOLERANCE
1/4″ to 1/2″ +0.001/-0.004″
4mm +0.05/-0.07mm
6mm to 12mm +0.05/-0.10mm
15mm +0.10/-0.10mm
Minimum Bend Radii
TUBE OD TUBE ID Minimum Bend Radius
1/4″ 0.170″ 1.00″
5/16″ 0.187″ 1.13″
3/8″ 0.250″ 1.25″
1/2″ 0.375″ 2.50″
4mm 2.5mm 25mm
6mm 4mm 25mm
8mm 6mm 30mm
10mm 7mm 32mm
12mm 9mm 63mm
15mm 11.5mm 100mm

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