What it means
DWV stands for drain, waste, and vent. Drain lines move wastewater by gravity, waste lines carry toilet discharge, and vent pipes admit air so water flows smoothly and sewer gases escape through the roof.
Every fixture connects to a trap and joins a vented branch before reaching the building drain. Poor venting causes gurgling, slow drains, and siphoned traps that allow odors indoors.
Why it matters in Santa Cruz County
Santa Cruz County remodels in older bungalows often uncover undersized DWV in walls that cannot handle modern fixture loads. Hillside additions in the mountains must extend vent stacks through roofs exposed to wind and redwood debris.
Homeowner tip
Gurgling from multiple fixtures at once usually points to a vent or main drain issue, not a single clog.
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Related glossary terms
Also explore the Septic Glossary or call 831.225.4344 with questions about your property.