Downspouts and Drainage

Old 04-29-02, 08:49 AM
Carl M
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Downspouts and Drainage

I have two corners of my house where I'd like to run the downspout into an underground pipe and away from the house down a slope. Are there any guidelines for pipe size, type of pipe (black corrugated vs. smooth PVC or clay pipe), slope, how deep to bury it, etc. that I need to follow to keep it from clogging? One of them will go under a concrete sidewalk.


Old 05-05-02, 12:17 PM
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Carl im a waterproofer. Most people feel they have to run drainage water far away from house . Fact is all you need to clear is 7 ft. The backfill soils against your house are roughly 4ft from foundation.

However people are people. If your going to do it have the pipe end at air. ie pitched slope. I would go down min 18 in'

if you have it open at the end(air) less chance of water freezing in pipe and backing up.


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