Downspout drain and sump pump discharge line tied together?

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MicahKautchick

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Mar 14, 2025
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Jamestown NY
Hello, first time posting here.

I bought this home as of last year and have a plumbing question...


When I moved in, I noticed water spilling over my gutter. The downspout drain line was clogged. I dug to find that the drain line was perforated corrugated pipe which had roots grown into and was plugged with rocks.

Since then, I have removed the corrugated line and am starting this new project now.

I have been digging the drainage ditch for this 4" PVC downspout line. I would like to tie my sump pump discharge into the line as shown by my drawing.

side note: I already have a sump pump basin from the previous homeowners. However, there was no pump or plumbing in place for the sump basin which I am adding now. (Westinghouse 1/2 HP sump pump).

Would this be kosher to tie the sump pump discharge and downspout drain line together as shown?

The drain line will go to a yard emitter down hill from the home.
 

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