Do I need to put any drainage gravel under the pipe?
Md Ariful Islam
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Dr. Md Rushad Rahman
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Absolutely, both above and below in order to support any heavy loads instead of having the pipe support anything (and to keep dirt from migrating into and clogging the system). It also allows for some minimal overflow until the pump can catch up. Make sure your piping (black corrugated drain tile) is set at or slightly below the bottom of the foundation's footer.
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