One line icon with only a thin black outline (in a line art style). The layers are named to facilitate your customization. Vector Illustration (EPS10, well layered and grouped). Easy to edit, manipulate, resize or colorize. And Jpeg file of different sizes. crushed can stock illustrations
The top of drain tile open joints must be protected with strips of building paper, and the drainage tiles or perforate pipe must be placed on a minimum of 2 inches of washed gravel or crushed rock at least one sieve size larger than the tile joint opening or perforation .