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Installation to comply with NZBC Clause G12 (2001) or NZS 4607:1989

Acceptable solution G12/AS1

States that hot and cold water supply systems when outside the building thermal envelope shall be protected from freezing. (refer G12 clause  7.2.1 and AS/NZS 3500)

Therefore it essential that all Apex valves outside the building thermal envelope must also be protected from freezing and it is recommended best practise that valves are installed WITHIN a building thermal envelope.
  • Valves must NOT be installed in ground.
  • Valves must be installed in a position where reasonable access is provided for maintenance and/or replacement.
  • Caution: do not apply heat near valves during installation.
Drain Lines
  • IMPORTANT: TAPS, VALVES OR OTHER SHUT-OFF DEVICES MUST NOT BE INSTALLED IN THE RELIEF OR EXPANSION DRAIN LINES.
  • Drain line should be copper, they should fall continuously from the valve outlet and be of the shortest possible length.
  • The discharge end of the drain line must be positioned so as any discharge will be visible, but not cause damage or a nuisance.
  • Drain lines must not be smaller than the outlet of the valve to which they are connected.
  • If relief valve drains are combined, a 25mm air gap must be maintained.

    RECOMMENDED
  • In frost areas fitting an EVT7.6 can protect cylinders in the event of exhaust pipe freezing
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