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Distribution Network Swabbing frequency

Distribution Network Swabbing frequency

Distribution Network Swabbing frequency

(OP)
Is there any general rules to how frequently Distribution Networks or Transmission Mains are Swabbed (cleaned) or is done on a case by case eg when flow rate drops, when consumers complain about colour etc.

How often are the utilities doing this in the US, UK or throughout Asia.

cheers

RE: Distribution Network Swabbing frequency

According to AWWA, "Most water utilities flush their distribution system pipes about once a year. Pipe flushing is done to improve water quality at the tap, exercise fire hydrants, uncover potential problems, and remove pipe tuberculation."  Which is also consistent with my experience.

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