Metric compression fittings can connect metal and poly pipe

If you need tough, flexible pipe fittings that can withstand a range of conditions, pressures and aggressive fluids, connect with PLASSON Metric Compression.

This makes metric poly pipe joiners ideal for residential and commercial plumbing as well as civil and industrial pipelines.

PLASSON engineers innovative pipe joining solutions – from slip repair fittings to MineSafe couplers and adjustable elbows to reducing tees.


Tough fittings that handle hot and cold climates

The flexible nature of polyethlene, or PE, means it will not expand or crack.

Rigid pipe can require multiple elbows to make complex turns where poly pipe is flexible and doesn’t need glue to hold pieces together.

Metric compression fittings use friction to achieve a water-tight seals on PE pipe.

  • Body and nut material: Polypropylene, high-grade copolymer
  • Split ring material: Polyacetal
  • Seal material: NBR
  • Maximum temperature of use for fittings and valves is the same as that for polyethylene pipe and they are not intended for use in hot water applications. They will withstand sub-zero temperatures.
  • Resistance to chemical
  • Compatible with PELD, PEHD, PE40, PE80 and PE100 pipes complying with AS/NZS 4130 Series 1

Often when assembling fittings, assemblers and engineers assume that “tighter is better”. This isn’t the case for metric compression fittings.   Insufficient tightening of the compression nut will not create enough contact between fitting and pipe, but over-tightening can lead to surface contact which weakens the seal and often results in leaks

Polyethylene is a cost-effective and technically superior alternative to many materials. It is easy to install, requires minimal connections and delivers exceptional system lifespan.

With over 40 years of installed history in the harshest of Australian conditions, PLASSON fittings are the toughest, most reliable and easiest to install poly pipe fittings available.


Tough Australian conditions means metric compression pipe fittings need to be tough too. PLASSON have been the most reliable connection systems for poly pipelines in Australia for over 40 years.

PLASSON compression fittings are designed for connecting all forms of PE Pipe. Common applications include plumbing, irrigation and commercial pipelines.  There are also fittings for specialist industries and industrial fluids.


Metric compression fittings often connect two pipes or a pipe to a fixture or valve.

These fittings are very strong and reliable and can be put install with the minimum of tools.  PLASSON compression fittings do not require any heating and work well even with wet pipes.

Compression fittings have options to connect household plumbing and pipes made of materials like:

  • Brass
  • PVC
  • Copper
  • Polyethylene