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Key Features
This double sink plumbing layout includes
- Hot and cold supply lines branching to each sink
- Centralized drain pipe serving both sinks
- Shared p-trap and cleanout access
- Equalized line routing for consistent pressure and temperature
- Vanity cutout and faucet placement for reference
Both sinks share a single drain line and p-trap rather than each getting its own, worth switching to separate lines if your local code requires individual traps for a double vanity.
Key Considerations When Designing a Double Sink Plumbing Layout
A shared drain and p-trap simplify installation compared to running two separate drain lines, which is standard practice for a double vanity in a bathroom. In ArcSite, you can mark up this layout with your own supply and drain routing for the vanity you're working on.
FAQ
While similar, kitchen layouts often include garbage disposals and dishwashers. This drawing is better suited to bathroom vanities.
No. As shown here, both sinks share a single drain line and p-trap to simplify installation, which is common in bathrooms.
Typically, 1/2” PEX or copper for supply lines, and 1-1/2” to 2” PVC or ABS for drainage.












