To provide an S-trap coinciding with the design outline of a Japan House Performance Display Standard and absorbing large positional displacement (core displacement) with an underfloor drain pipe and inhibiting even drainage noises at a low value.
In a stick 2, a stick upper section 12a and an inflexible stick lower section 12b being rotatably connected to the stick upper section 12a and having a horizontal tube section or a downward inclined tube section 12b-1 are installed and the center of the outlet of the stick lower section 12b is displaced to the center of a connecting section with the stick upper section 12a, positional displacement (core displacement) with the underfloor drain tube 8 is absorbed by a rotary function to the stick upper section 12a of the stick lower section 12b and a rotary function to the U-tube 1 of the stick upper section 12a and the stick lower section 12b is connected to the underfloor drain pipe 8, a drainage decelerating section 10 is composed of the horizontal tube section or the downward inclined tube section 12b-1, and the drainage decelerating section 10 is utilized effectively and the force of drain is weakened and the drain is further made to collide with a projecting section 9 and drain is decelerated and the suction of air is prevented.
MIZUTANI SORO
ITO HIROTAKA
