Gravel

1 1/2” Gravel: a washed processed rock that has been screened to 1 1/2” rock (biggest) downsized to 3/4” (smallest). No binder is mixed with this. Used for conventional septic systems.
3/8” Gravel: also called pea gravel, a washed processed rock that has been screened to 3/8” rock (biggest) downsized to fines.