Water heaters must be adequately supported and restrained to resist earthquake forces. Water heaters
up to 360l capacity may be restrained according to Acceptable Solution G12/AS1 below, or
alternatively, in accordance with Section 203 of NZS 4603.
4.5 Electrical installation
Sigma Sheetmetal Products Limited. Subject to technical modifications Page 9
Extra strap for cylinders
exceeding 200lts
100mm max
100mm max
Tensioned 25 x 1 mm
galvanized steel straps
Fixed to wall framing with 1 off 8mm
coach screw with 30x2mm washer
Screws to penetrate timber framing a
minimum of 50mm
Light timber frame wall complying
with NZS 3604
50x50mm vertical blocking full height of
water heater, fixed to wall framing with 1
off 100x3.75mm nail at 600 maximum
centres
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