Tub box

A plastic housing portion used to make a tub box for receiving a drain trap comprising a plurality of continuous side walls forming a hollow enclosure open at one end and closed at an other end, said open end being surrounded by a radial outturned edge flange, at least one round knockout in at least one of said side walls which when removed forms a round opening in said one side wall, at least one edge flange knockout in said edge flange and said one side wall in line with said round knockout, said edge flange knockout terminating in close proximity to said round knockout whereby when said edge flange knockout is removed along with said round knockout, a knockout opening is formed in said one side wall that extends to the open end of said housing portion, and a pull tab protruding outwardly from said round knockout, said side walls being tapered from said open end to said closed end to permit a plurality of identical housing portions to be stacked inside one another, said pull tab being located a predetermined distance from said closed end of said housing portion to limit the amount of nesting of a plurality of said housing portions inside one another so that said housing portions won't stick together when pulled apart.

A plastic housing portion used to make a tub box for receiving a drain trap comprising a plurality of continuous side walls forming a hollow enclosure open at one end and closed at an other end, said open end being surrounded by a radial outturned edge flange, at least one round knockout in at least one of said side walls which when removed forms a round opening in said one side wall, at least one edge flange knockout in said edge flange and said one side wall in line with said round knockout, said edge flange knockout terminating in close proximity to said round knockout whereby when said edge flange knockout is removed along with said round knockout, a knockout opening is formed in said one side wall that extends to the open end of said housing portion, and concentric smaller and larger diameter round knockouts in said closed end of said housing portion, said smaller diameter knockout being formed by a thinner frangible section in said closed end than said larger diameter knockout to permit removal of said smaller diameter knockout without removing said larger diameter knockout.

A tub box for receiving a drain trap comprising identical plastic top and bottom housing portions each having a plurality of continuous side walls forming a hollow enclosure open at one end and closed at an other end, said open end of each of said housing portions being surrounded by a radial outturned edge flange, the edge flange of each of said housing portions being in mating engagement with one another, a round knockout in one of said side walls of said housing portions which when removed forms a round opening for receipt of a round pipe for connection to a drain trap within said tub box, and an edge flange knockout in said edge flange and said one side wall in line with said round knockout, said edge flange knockout terminating in close proximity to said round knockout, whereby when said edge flange knockout is removed along with said round knockout, a generally U-shaped knockout opening is formed in said one side wall that extends to the open end of the associated housing portion, said round knockout being formed by a thinner frangible section in said one side wall than said edge flange knockout to permit removal of said round knockout without removing said edge flange knockout.

A tub box for receiving a drain trap comprising identical plastic top and bottom housing portions each having a plurality of continuous side walls forming a hollow enclosure open at one end and closed at an other end, said open end of each of said housing portions being surrounded by a radial outturned edge flange in mating engagement with one another, one or more round knockouts in one or more of said side walls which when removed form a round opening for receipt of a round pipe for connection to a drain trap within said tub box, and a pull tab protruding outwardly from said round knockout, said side walls of each of said housing portions being tapered from said open end to said closed end to permit a plurality of said housing portions to be stacked inside one another, said pull tab on each of said housing portions being located a predetermined distance from said closed end of each of said housing portions to limit the amount of nesting of said housing portions inside one another so that said housing portions won't stick together when pulled apart.

A tub box for receiving a drain trap comprising identical plastic top and bottom housing portions each having a plurality of continuous side walls forming a hollow enclosure open at one end and closed at an other end, said open end of said housing portions being surrounded by radial outturned edge flanges extending radially outwardly of said side walls, said edge flanges being in mating engagement with one another, and a lip extending axially outward from an outer edge of said edge flanges around one half only of the periphery of each of said housing portions for overlapping the outer edge of the other housing portion to locate and align said housing portions with respect to one another and to act as a dam preventing concrete or dirt placed around said tub box from entering said tub box between said edge flanges, said edge flanges being adhesively bonded together. Said overlapping lips acting as a dam to hold a bead of adhesive between said edge flanges.