Double Sink Plumbing Layout

Two sinks sharing one drain line need the p-trap and cleanout placed so both sides drain evenly, a detail this layout works out for you. ArcSite's double sink plumbing layout gives you that routing already in place, ready to adjust to your own vanity.

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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.

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FAQ

Can this setup be used for a kitchen double sink?

While similar, kitchen layouts often include garbage disposals and dishwashers. This drawing is better suited to bathroom vanities.

Do both sinks need individual p-traps?

No. As shown here, both sinks share a single drain line and p-trap to simplify installation, which is common in bathrooms.

What size pipe should I use for this layout?

Typically, 1/2” PEX or copper for supply lines, and 1-1/2” to 2” PVC or ABS for drainage.