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· Registered
56 Posts
Discussion Starter · #1 ·
Hi All

Looking to do a 7x4 shower with 2 heads in master bath. What would the DFU be?

IL Plumbing code says

Shower stall DFU: 3 - Min Trap: 2"
Showers (group) per header DFU: 3 - Min Trap: 2"

Does this mean it's 6 DFU and a 4" Drain?

I was planning to have a linear drain



· Premium Member
13,091 Posts
My interpretation would be a single 6 DFU trap. Which is a 3" trap per UPC, with a 2" vent
Or 2ea, 3DFU traps. 2" min trap
Hope that helped.....
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