Patent attributes
A doorway with anti-bubbling sill drain includes spaced vertical side jambs, a head jamb, and a substantially hollow contain-and-drain sill, all of which form a frame. The sill has an outside nosing provided with weep holes and weep doors and a threshold portion that directly underlies a closed door mounted in the frame. A drain insert is mounted within an oblong hole in the threshold portion of the sill for allowing water collected on the threshold portion to drain into the sill and for allowing air within the sill to vent. The drain insert has a top cover, from the end portions of which a pair of drains depend. The tops of the drains are spaced from the underside of the top cover to form drain entrances. An open vent space is formed between the two drains and terminates at its upper extent in drain holes formed through the top cover. When installed, the drains extend down into the interior of the sill with the drain entrances being flush with the floor of the threshold portion. Water on the threshold portion drains into the drain entrances and through the two drains into the sill while air escaping from within the sill vents through the separate vent space and vent holes above. Percolation and bubbling at the drain location is thus eliminated.
