Materials

• Pipework used for the installation of mechanical systems must be approved and can be either copper, stainless steel, mild steel or HDPE.
• Pipework made from Acrylonitrile Butadiene Styrene (ABS) or Aquatherm (PP-R) must not be used.

Supports

• Pipework must be neatly set out, level and parallel with walls/other services.
• Support spacing of pipework must be located at centres in accordance with the following standards (which are summarised in Appendix 3 and 4) or where recommended by the piping materials manufacturer:
• Steel pipe to AS 4041 Table 3.28.2.
• Copper pipes to AS 4809 Table 6.2.
• Other nonferrous pipe to AS 3500.1 Table 5.6.4.

Expansion Devices

• Expansion devices for pipework must be:
• Detailed and installed as per approved shop drawings
• Installed as per manufacturer’s specifications.

Insulation

• Pipework must be insulated, including:
• Heat and chilled water piping and associated fittings
• Refrigerant suction lines
• Refrigerant liquid lines
• Condensate lines

UV Protection

• Pipework, conduits and insulation exposed to sunlight / ultra violet light must be UV stable or protected to prevent degradation.

Testing

• Pipework must be tested for a period of 2 hours minimum with a pressure of 1.5 times the working pressure of the system or as per specification.