[file photo]The Water Authority has announced planned maintenance works at the Tamavua Water Treatment Plant this weekend, which may temporarily affect supply in several areas. WAF says the maintenance involves the replacement of a valve at the plant’s inlet, which regulates the flow of raw water from the Savura Raw Water Pump Station. Article continues after advertisementInvestigations by WAF engineers found the valve to be defective, causing unstable water inflows and operational strain across the supply system. It says undertaking these works as a planned shutdown allows them to prevent an imminent major asset failure, avoid unplanned service disruptions, and improve the reliability and resilience of the Tamavua water supply system. During the maintenance, treatment capacity at Tamavua Plant will be reduced by approximately 50 per cent.