Drain fitting and installation methods

A drain fitting comprising:

• a drain body of one-piece construction, the drain body having a top side, a top opening on the top side, a bottom side opposite the top side, a bottom opening on the bottom side, an outer periphery, an inner periphery, an axis extending vertically through the top opening and the bottom opening, and a peripherally enclosed flow channel extending vertically from the top opening to the bottom opening and radially outwardly from the axis to the inner periphery;
• the drain body comprising:
• a drain cup, the drain cup comprising a cup sidewall and a cup floor, the cup sidewall extending circumferentially around the flow channel and having an upper end circumscribing the top opening, the cup floor being connected to a lower end of the cup sidewall, the flow channel comprising a throat region extending vertically through the cup floor;
• a hub connection, the hub connection comprising a hub sidewall connected to a bottom side of the cup floor, the hub sidewall extending circumferentially around the flow channel, a lower end of the hub sidewall circumscribing the bottom opening;
• a peripheral mounting flange, the mounting flange being connected to and extending radially outwardly from and circumferentially around the cup sidewall, the mounting flange comprising at least one fastener hole extending through a vertical thickness of the mounting flange, the mounting flange fastener hole being spaced radially outwardly from the cup sidewall and radially outwardly from the hub sidewall;
• each of the cup floor and the mounting flange having a planar lower surface, the cup floor lower surface being coplanar with the mounting flange lower surface.

A method of installing a floor drain fitting, the floor drain fitting comprising a one-piece drain body having a top side, a top opening on the top side, a bottom side opposite the top side, a bottom opening on the bottom side, an outer periphery, an inner periphery, an axis extending vertically through the top opening and the bottom opening, and a peripherally enclosed flow channel extending vertically from the top opening to the bottom opening and radially outwardly from the axis to the inner periphery;

• the drain body comprising a drain cup, a hub connection, and a peripheral mounting flange, the drain cup circumscribing the top opening, the hub connection circumscribing the bottom opening, the mounting flange being connected to and extending radially outwardly from and circumferentially around the drain cup, the mounting flange comprising at least one fastener hole extending through a vertical thickness of the mounting flange, the mounting flange fastener hole being spaced radially outwardly from the drain cup and the hub connection, the method comprising:
• positioning the drain body so that the drain cup extends upwardly through a hole formed in a subfloor, so that the mounting flange is disposed against a lower surface of the subfloor, and so that the subfloor lower surface overlaps the fastener holes;
• and
• driving the fasteners upwardly through the fastener holes and into the subfloor to fasten the mounting flange to the subfloor.

A method of installing a floor drain fitting, the floor drain fitting comprising a one-piece drain body having a top side, a top opening on the top side, a bottom side opposite the top side, a bottom opening on the bottom side, an outer periphery, an inner periphery, an axis extending vertically through the top opening and the bottom opening, and a peripherally enclosed flow channel extending vertically from the top opening to the bottom opening and radially outwardly from the axis to the inner periphery;

• the drain body comprising a drain cup, a hub connection, and a peripheral mounting flange, the drain cup circumscribing the top opening, the hub connection circumscribing the bottom opening, the mounting flange being connected to and extending radially outwardly from and circumferentially around the drain cup, the mounting flange comprising at least one fastener hole extending through a vertical thickness of the mounting flange, the mounting flange fastener hole being spaced radially outwardly from the drain cup and the hub connection, the method comprising:
• positioning the drain body so that the hub connection extends downwardly through a hole formed in a subfloor, so that the mounting flange is disposed against an upper surface of the subfloor, and so that the upper subfloor surface overlaps the fastener holes, and driving the fasteners downwardly through the fastener holes and into the subfloor to fasten the mounting flange to the subfloor.