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Gilbert staff favor PVC for most sewer work as outside engineer urges clay pipe
Summary
At a Dec. 16 study session, Public Works Assistant Director Ken Snow told council that PVC is the town’s preferred sewer material for most projects; an outside engineer and a Home Builders Association representative offered contrasting views about longevity, cost and installation trade-offs.
Ken Snow, the town’s public works assistant director, told the Gilbert Town Council on Dec. 16 that the town’s life-cycle analysis generally favors polyvinyl chloride (PVC) pipe for most wastewater collection work because it is lighter, installs in longer lengths (fewer joints) and tends to reduce handling and maintenance costs.
The issue matters because Gilbert’s system includes older vitrified clay pipe (VCP) in parts of town and ductile iron in structural or pressurized locations; council members pressed staff about past failures and why certain materials remain in the standards. Snow said VCP remains allowed with town‑engineer approval and that ductile iron is still required for sites that cross highways or railroads, where a structural material is…
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