The scheme has been devised using sources from BSRIA, looking at the function of O&M manuals and application guides on legionella maintenance, as well as considering revised CDM regulations. The package includes asset surveys of items such as water tanks, cylinders and point-of use outlets, a written assessment of legionella risk and a ‘suitable and sufficient’ maintenance plan, complete with 12-month log booklet.

Initially, schematic drawings are reviewed for good practice. Attention is paid to details such a full-bore flushing valves at the base of cylinders and access for temperature checks at the hot and cold inlet of mixing valves.

Installation contractors are provided with as-fitted drawings of domestic water services, including details relevant to the legionella maintenance scheme.

Clients benefit because they do not need to outsource a risk assessment of their new building within the defects liability period.

Maintenance companies can tender the works without misunderstanding of minimum requirements.

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