Step 1: Dig the Hole and Trench

digging a hole for a dry well
Photo: Ryan Benyi
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Coming out from the downspout, at least 10 feet from the foundation (and 3 feet from any property line), dig a hole about 4 feet deep and wide. With a long-handled shovel, tunnel under the sidewalk and dig a trench 1 foot deep and 6 inches wide that slopes gradually toward the hole. Shovel the soil onto a tarp. Save the sod to patch over the hole.
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    Tools List

    • trenching shovel
      Spade shovel
    • tarp
      Plastic or canvas tarp
    • wheelbarrow
      Wheelbarrow
    • two-foot level
      Level
    • 30-foot tape measure
      Tape measure
    • hammer
      Hammer
    • drill
      Drill/driver
    • reciprocating saw
      Reciprocating saw

    Shopping List

    1. Flo-Well dry well

    2. Overflow emitter

    3. Landscape fabric

    4. ¾-inch rounded stone, washed

    5. 4-inch-diameter PVC pipe6. 4-inch-diameter 90-degree elbow

    7. Downspout adaptor

    8. PVC cement

    9. Stainless-steel sheet-metal screws