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davidro1_gw

Right size drain diameter

davidro1
11 years ago

Shower drains drain well when 1.5" diameter. The drain pipe there is an "arm" not a branch, so it can go a certain distance (depending on its diameter) before it needs to connect to venting. Then it becomes a branch not an arm.

Same for washing machine drains.

Here is a link that might be useful: Side discussion here, on drain size for washer

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