Open drainage is created very simply and is a dug trench around the perimeter of the site at such a level that the wastewater flow is directed from the site. Along the house, various structures and paths, recesses flowing into trenches are made, water also flows along them, heading from the site. Drainage, created in this way, is quickly destroyed and spoils the appearance of the site. Therefore, it is reasonable to place special plastic trays in the grooves and cover them with metal or plastic grilles.
