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Just wondering if this is common…
our washer/dryer is in a small added on room off the ground floor kitchen in the back of our garden duplex. The washer drains into a pipe behind it that has another large pipe running into it too. I have discovered I can’t do laundry when it rains because it looks like the 2nd pipe is the drain pipe from the roof and lots of water rushes through it when it rains. If I run the washer and it drains, it is too much water for the pipe too handle. Where does that water go? Into the sewer? The other reason I think it is the rain pipe from the roof is that is runs down along what used to be the outside of the building before the little washer room was built.
Thanks