Following issue of the Conformance Certificate, Irish Water requires night flow audits to be carried out on the water supply infrastructure within a Development during the Defects Liability Period, at the frequency required by Irish Water's field engineers (IW-CDS-5020-03, Section 4.14). The audit uses the bulk meter or night flow chamber installed within the Development to measure the minimum night flow — any flow above the expected level indicates a leak within the water supply infrastructure. We carry out night flow audits on behalf of developers, interpret the results, and where a deficit is identified, carry out leak investigation, acoustic leak detection, and repair to restore compliance.
What We Carry Out
- Night flow audit using bulk meter or night flow chamber
- Measurement and recording of minimum night flow
- Comparison against acceptable benchmark — any excess flow indicates a leak
- Acoustic leak detection to locate the source of any identified deficit
- Repair of identified leaks within the Works
- Repeat night flow audit to confirm repair success
- Full audit report issued and results provided to Irish Water
- Carried out at the frequency required by Irish Water field engineers during the Defects Liability Period
