What it means
Wastewater enters the first compartment where most settling occurs. Effluent passes through a baffle opening into a second compartment for additional clarification before the outlet.
Two-compartment tanks are required or preferred in many modern codes because they produce cleaner effluent than single-chamber tanks of similar size.
Why it matters in Santa Cruz County
New Santa Cruz County installations and upgrades often specify two-compartment tanks to meet current state standards and protect sensitive drain fields.
Homeowner tip
During pumping, confirm both compartments are cleaned; leaving sludge in the first side shortens time until the next service.
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Related glossary terms
Also explore the Plumbing Glossary or call 831.225.4344 with questions about your property.