This is a question about how to connect various drain pipes together.
I've got a 4" corrugated pipe running down the side of my house, to the
I want to connect my sump pump to this pipe, so the water discharge
runs to the street also. But my sump pump uses 2" PVC.
How do I connect 2" PVC to a 4" corrugated pipe?
I recently did some work on our gutter drains, and saw adapters in our
local home center to go from 4" corrugated pipe to 4" rigid pipe. I saw
them at a few different stores, so I assume they are fairly common. You can
then use a regular PVC reducer bushing or two, or even a Fernco coupling to
get down to the 2" pipe. For that matter, a Fernco coupling might even fit
over the corrugated pipe? You'd have to try it at the store and see how it
fits. You might need a short length of pipe too to make the various
Four inch "drainage" pipe has a slightly different size then regular four
inch "DWV" pipe, but I'm sure you could find adapters to connect the two.
It would take a few fittings, but it should be doable.
Just an update to finish the topic off.
First, the sump pump pipe was 1.5" DWV (not 2" as my post originally
All of the hardware stores in my area had identical fittings for S&D
pipe -- the normal Wyes, Tees, elbows, etc. Except the small hardware
store down the street had one fitting different from the rest -- a 1.5"
DWV to 4" S&D adapter. It wasn't even on their price list. I had to
make them take me out back so I can see their selection. Anyway, it was
exactly what I needed.
If they hadn't had that exact adapter, then I would have been able to
convert 4" S&D to xx" DWV and then used a second adapter to go xx" DWV
to 1.5" DWV.
I installed everything last weekend and everything seems great.
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