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Plumbing and Drainage Regulation 2019
sch.1-sec.7Backflow prevention devices
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sch.1-sec.7 Backflow prevention devices
work necessary for installing, replacing or removing a testable backflow prevention device or a dual check valve with atmospheric port, if the work is for— an existing building; or an extension to an existing class 1 building; or a structure for an existing class 1 building
- • an existing building; or
- • an extension to an existing class 1 building; or
- • a structure for an existing class 1 building