Approved method of installation, also known as an Approved Installation Method (AIM) 

A method of installation approved by the water undertakers (water suppliers) under Regulation 4 of the Water Supply (Water Fittings) Regulation/Scottish Water Byelaws. 

Regulations 4 (6) & 12 of the Water Supply (Water Fittings) Regulations and/or Scottish Water Byelaws. 

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