DIY Network

Pump Housing Pump Housing From "Grounds for Improvement" episode DGFI-112

After the hole has been dug to 24", it's time to create the area for the centipede unit, which is actually the housing for the waterfall pump.

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The centipede is the housing for the waterfall pump.

Place the centipede in the hole, and mark an outline around it so you'll be able to dig a trench for it to sit in. With the outline marked, remove the centipede unit and begin digging the trench. The trench should be large enough for the centipede unit to sit in comfortably.

The underlayment goes in next. It protects the liner from any rocks or roots that otherwise might puncture the material. After the underlayment is in, you can place the liner on top, and then follow up with the centipede unit at the base of the hole.

Figure A

Placing large rocks on top and around the centipede unit will help keep it in place as well as create a great filtering system for the pump (figure A). When transporting the rocks from one area to the other, use a wheelbarrow to help ease the load off your back. Continue filling up the hole with rocks and gravel until you reach the top.