Suds Relief for washing machine stacks?

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Is suds relief code relevant or implemented anymore at all?

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John McMullen

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Hello,

I don't belief the IPC lists "suds relief" or keeping a minimum distance of 8 ft from washing machine stacks (From other stacks). Only an obscure old reference from the UPC. I have never seen this called out on any plumbing plans. Only a slight reference to it recently brought it up in my mind.


Is suds relief (the above code), still relevant at all?

What if there is a combined bathroom group stack with a washing machine tied into the common 4" sanitary stack (5 stories tall)? Is this considered a "suds stack"?

Thanks
 
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