Materials

We need these materials for the demo:

-Hand pump

-10ft pvc 1/2 inch outer diameter

-Bucket

-One way valve 1/2 inch outer diameter

-Clear plastic tube 1/2 inch outer diameter

-Pvc cement

-4 pvc elbows 1/2 inch outer diameter

-1 cup sand

-1 cup charcoal

-1 cup gravel

-1 cup small rocks

-3 gallons muddy water