drainage

the pipe is connected to the brick wall and has been dug into the ground for drainage
27 Illustrations Will Help You Understand How To Install An Underground Drainage System! | Engineering Discoveries
a drain in the ground next to a wall and some metal grates on top of it
38+ Photos Of Trench Drain System That You Have Never Seen! | Engineering Discoveries
38+ Photos Of Trench Drain System That You Have Never Seen! | Engineering Discoveries 38+ Photos Of Trench Drain System That You Have Never Seen!
the pipes are lined up on the side of the building and ready to be installed
31+ Mesmerizing Photos of Trench Drain Systems | Engineering Discoveries
the side of a building that is being constructed with concrete and steel grate lines
38+ Photos Of Trench Drain System That You Have Never Seen! | Engineering Discoveries
38+ Photos Of Trench Drain System That You Have Never Seen! | Engineering Discoveries 38+ Photos Of Trench Drain System That You Have Never Seen!