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Infiltration of surface water into the foul water system

Avoid surface water infiltration by meeting relevant requirements of the Building Code and Acceptable Solutions.

This information is published by the Ministry of Business, Innovation and Employment’s Chief Executive. It is a general guide only and, if used, does not relieve any person of the obligation to consider any matter to which the information relates according to the circumstances of the particular case. Expert advice may be required in specific circumstances. Where this information relates to assisting people: