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Printer Friendly VersionSelected Information - Completed Research

CP188  Long Term Performance of Domestic Meters Demand Management
Meter replacement strategies, derived from CAPEX / OPEX motives, should be underpinned by a good understanding of meter deterioration.

Long term performance has been examined for Class D rotary piston meters (the majority of the ageing domestic meter stock in the UK). These previous studies covered meter performance after 5 and then 8 years in service and showed that under-registration increased gradually over time. However, a small proportion of the 8 year old meters showed a large under-registration.

Anecdotal evidence is now emerging that the rate of decline in performance may accelerate rapidly after this period, with errors of 10 - 30% (representing 15 - 40 m3 per annum per property) in meters with >10 years service. In the previous studies where a small proportion of meters with high errors were found, were these generally representative of the ageing stock or were they outliers found found in every sample? If a high level of error is identified generally within the ageing stock, it will have significant impacts on revenue, water balance calculations and metering replacement strategies. This project will therefore update the 5 / 8 year old performance studies to encompass 10 - 12 year old meters.

Benefits to Clients

  • Identify revenue loss from poorly performing meters
  • Reduce uncertainty in the water balance
  • Information will be provided on which to confirm / alter meter replacement strategies
  • Evidence will be available to the Regulators to justify Utility meter replacement policy.
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