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Millbrae installs dual-shaft grinder at Madrone pump station to reduce blockages from wet wipes
Summary
City engineers installed a dual-shaft “wipes-ready” grinder at the Madrone Street pump station on Aug. 20 to reduce pump clogs from nondispersible wipes and similar material. City Engineer Ahmad Haya said the $25,000 unit should lower maintenance, reduce pump run time and protect equipment; staff reiterated the public should not flush wipes.
Millbrae installed a dual‑shaft solids grinder at the Madrone Street sewage pump station on Aug. 20 to address recurring clogs caused by nondispersible wipes and fibrous materials, city staff told the City Council during the Sept. 23 meeting.
City Engineer and CIP Manager Ahmad Haya presented the work and said the unit — a wipes‑ready dual‑shaft grinder sometimes marketed under the trade name “Muffin Monster” — was installed as an upgrade to reduce deragging and pump wear. Haya said the grinder has 17‑tooth serrated cutters designed to reduce wipes and similar material into particles that pumps can convey and that screens at the wastewater treatment plant will capture many of those…
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