Abstract: A sanitary syphon gas trap particularly adapted for use in association with squat-type water closets, which are installed at floor grade level, which trap has an inlet arm and an outlet arm of circular cross-section, and an angularly disposed seal arm in rebent relationship to said inlet arm intermediate the inlet and outlet. The seal arm has an arcuate non-circular cross-section whose area is less than the flow area of said inlet arm and whose juncture with the outlet arm defines a flow-fall which is out of the main stream of the flow path between the seal arm and the outlet arm. A downwardly directed water jet from the water closet initiates a Venturi effect of high velocity flow in the seal arm for waste discharge.

Abstract: A squat-type water closet self-supporting in environment of installation, especially in a poured or pre-cast slab-type floor, without need of boxing, is provided by a bowl casting having a horizontal cast flange for anchored support on a rough slab or other environmental structure, and a flush rim casting gasketed to a seat on and defining with the bowl top margin a flushing water passage and peripheral bowl-flushing slot; the rim opening being level with floor and defining the visible closet opening; a vitreous coat and/or full porcelain enamel being applied to wetted and visible surfaces; the two members being shaped for casting without coring; and flashing-securing means being optional.