Drainage, Waste & VentQuestion 136 of 360
A sump or receiving tank that collects sewage from fixtures located below the sewer level must be…
a.open to the room for inspection
b.vented only to the interior of the building
c.left unvented if the pump is sealed
d.gastight (sealed) and provided with a vent to the outside air
Explanation
A sump that receives sewage must be gastight and vented to the outside air to control sewer gas and equalize pressure as the pump cycles. An open or interior-vented sump would release odors and gases into the building. Clear-water sumps that handle no sewage may have different requirements.
Law Reference: 2022 California Plumbing Code (CPC) §710.0Practice all 360 questions free — no signup required.
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