Laundry Plumbing Rough In Diagram

A well-planned laundry room means loads get done without hauling baskets to the basement or fighting a drain that backs up mid-cycle. ArcSite's laundry plumbing rough in diagram sets the standpipe and trap heights before the drywall goes up.

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Key Features

This laundry plumbing rough in diagram includes:

  • Clothes washer and drain hose
  • Indirect connection at the top of the standpipe
  • Standpipe 18" to 42" above the trap
  • P-trap at the standpipe base
  • Trap 6" to 8" above the floor
  • Sanitary tee into the waste stack
  • Waste stack through the floor

The indirect connection keeps the drain hose loose in the standpipe instead of sealed to it, which breaks the siphon so drain water doesn't get pulled back toward the washer.

Key Considerations When Installing a Laundry Drain

The standpipe needs enough height above the trap to absorb the washer's pump surge without overflowing, and codes commonly set that at 18" to 42". ArcSite lets you set those heights on your customer's laundry wall and hand the rough in to your crew with the numbers on it.

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FAQ

Does this diagram include the water supply lines?

No. It covers the drain side only. Add the hot and cold supply valves in ArcSite to show the full laundry rough in.

Can I change the standpipe height?

Yes! You can adjust the standpipe and trap heights in ArcSite to match your local code and the washer you're installing.

Can I try ArcSite before I buy it?

Yes! ArcSite offers a free trial, so you can draw your next rough in and see how it fits the way your shop works.