• Hold valid water industry competence qualifications before carrying out installation work.
• Support all trenches in highways according to the method statement and ground conditions.
• Use trained operatives with correct certification for DI or PE pipe jointing methods.
• Follow COSHH procedures and wear specified PPE when handling chlorination chemicals.
• Establish exclusion zones during hydrostatic pressure testing of completed pipeline sections.
• Locate existing live water mains and maintain safe working distances during installation.
• Follow strict hygiene procedures to prevent contamination of the new pipeline.
• Obtain authorisation from the water company before operating any existing valves.
• Cap and protect open pipe ends overnight to prevent contamination from entering.
• Record all test results and chlorination data for commissioning handover documentation.

• DON'T carry out water main work without the required industry competence qualifications.
• DON'T work in unsupported highway trenches — traffic loading increases collapse risk.
• DON'T joint pipes without the correct certification for the specific material and method.
• DON'T handle chlorine without PPE — it causes severe burns to skin, eyes, and lungs.
• DON'T stand near pipework during pressure testing — stay outside the exclusion zone.
• DON'T damage existing live water mains — locate them before excavation begins.
• DON'T allow soil, debris, or animals to enter open pipe ends during installation.
• DON'T operate existing water network valves without water company authorisation.
• DON'T leave pipe ends open and unprotected overnight or during breaks.
• DON'T commission a new main without completed test results meeting the specification.

See also: Utility Works Safety Awareness | Hydrostatic Pressure Testing