Extending a Drain Pipe Down a Hillside: Flex Pipe Solution

Question: Water from pipe created gully down hill. Want to extend pipe to bottom in sections. Need glue and threading? Sandbags or dirt first? Cover with dirt/sand?

Simple Solution

Use flex pipe. Attach to existing pipe with clamp, cover whole thing with soil. May need adapter—hardware store has everything. For simple drain (not under pressure), flex pipe is easier, conforms to trench. No sandbags needed—just cover with soil.