MUNICIPEX Pre-insulated coil

MUNICIPEX pre-insulated

MUNICIPEX Pre-insulated cutaway

MUNICIPEX® pre-insulated pipe is specially designed for water distribution in cold climates that require an extra level of protection from freezing, or when laying pipe below the frost line is not possible. MUNICIPEX pre-insulated consists of REHAU MUNICIPEX PEXa carrier pipe surrounded by a solid layer of CFC-free polyurethane foam insulation and a corrugated LDPE outer casing. The insulation is bonded to both the outer casing and the MUNICIPEX carrier pipe, increasing durability and flexibility. A conduit is fixed to the MUNICIPEX pipe allowing for the use of heat trace wires. Backed by a 25-year limited warranty for the carrier pipe.

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Installation options

  • MUNICIPEX PEXa carrier pipe is compatible with AWWA C800 fittings using standard pipe wrenches. No specialized tools required. 
  • Up to 300 ft. coils, also available cut to length.
  • Use your own tracer wire in the pre-installed conduit.
  • 2 in. MUNICIPEX can be tapped with service saddles. See REHAU Technical Bulletin 259 for clarification.
MUNICIPEX Pre-insulated Thompson


Follow all handling and installation instructions found on the packaging and in the installation guide.  It is the responsibility of the installer to ensure fittings selected meet local jurisdiction codes.  For additional information, contact your regional REHAU sales office.

MUNICIPEX PEXa carrier pipe certifications and listings

  • Produced to CTS (Copper Tube Size) SDR9
  • Compatible with AWWA C800 fittings.
  • Certified to AWWA C904
  • Certified to CSA B137.5
  • Certified to ASTM F876
  • Certified to NSF/ANSI Standard 14 and 61 (NSF-pw)
  • Tested in accordance with UV resistance to ASTM F2657 for a period of 1 year
  • Exceeds chlorine resistance requirements of ASTM F876, when tested in accordance with ASTM F2023
  • Compatible with AWWA C800 valves and fittings

Minimum burst pressure requirements    

  • 475 psi @ 73.4°F (3,310 kPa @ 23°C)
  • 210 psi @ 180°F (690 kPa @ 82.2°C)
  • 180 psi @ 200°F (550 kPa @ 93.3°C)

Temperature and pressure ratings

  • 200 psi @ 73.4°F (1,380 kPa @ 23°C)*
  • 160 psi @ 73.4°F (1,105 kPa @ 23°C)
  • 100 psi @ 180°F (690 kPa @ 82°C)

*Continuous-use ratings using design factor of 0.63.  See REHAU Technical Bulletin 239 for clarification.

Technical downloads

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