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The different types of Polyethylene Pipe in the New Zealand Market cause headaches for many people trying to figure out what pipe they need, or already have on their property and matching this up with the fittings they need.

Simple Explanation:
It’s a long story but to make it short LDPE is only made in NZ and Australia. Its measurement is based on the internal size of the pipe, MDPE is made worldwide and is measured on the external diameter of the pipe. Horticultural Lateral Tube is used for connection of sprinklers and drippers. These pipes use different fittings, click on the links below to see what the fittings look like

The Manufacturers

There are 6 main manufacturers of Poly pipe and there are numerous New Zealand based and international suppliers of fittings for the pipe, all making for confusing times for those who are new to choosing pipe and fittings.

Pipe Measurements

The Pipe is made to NZ standards and this table below details Pipe diameters in NZ

There will be slight variations between manufacturers in these measurements. These measurement are based off the RX Pipe Guide

If you find you need to measure pipe regularly use the Hansen pipe measuring tool.

  • hansen han tool

    Hansen Han-Tool

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NB: This explanation has excluded PE pipe for Civil use and Effluent Pipe

Below are details of the different brands and manufacturers, this may not be a complete list but it is to my knowledge

Major Pipe Brands

Low Density

  • Iplex - Novathene
  • RX Plastics - LDPE
  • Marley - Enduro Flex, 950 Series
  • Rural Direct - LDPE
  • Waters and Farr - Imperial LDPE

Fittings to Use

  • Hansen
  • Anka

Medium Density

  • Iplex - Greenline, Redline, Blueline, Blackline, Rural Black, Effluent
  • RX Plastics - MDOD, MDID (MDID pipe uses LDPE fittings)
  • Marley - Oasis
  • Asmuss Water Systems
  • Waters and Farr

Fittings to Use

  • Plasson
  • Hansen Compression
  • Philmac
  • RX Compression
  • Jimten Gamma
  • RX
  • Metric
  • Elsysee
  • Irritec
  • Electrofusion
  • (numerous other manufacturers).


  • Iplex - Novatube (5bar)
  • RX Plastics - Hort Lat Tube (3bar), Horticultural Lateral Tube (5bar)
  • Wetta - Lateral (3bar)
  • Rural Direct - Lateral (3bar)
  • Waters and Farr - Hi Pol

Fittings to use

  • Antelco
  • Wingfield
  • RX