PURPOSE: To make it exhibit drainage function without providing a trap separately by lowering a drainage horizontal branch pipe once from a drain source, and then raising it to the level higher than this and lower than the drain source end connecting it to a vertical pipe.
CONSTITUTION: An indoor drainage system 10 is constituted, in which a drain source such as a sink 12, etc., and a drain vertical pipe 48 are coupled with a drain horizontal branch pipe 40, and the drain is discharged compulsorily using a pump 20. This drain horizontal pipe 40 is lowered once from the drain source to a first level lower than this, and next this is raised from the first level to a second level lower than the drain source and higher than the first level, and then it is connected to a drain vertical pipe 48. Hereby, one part of the drain horizontal pipe 40 can be made to function as a trap, and the necessity of equipping a trap separately can be removed.
WO/2014/163649 | DRAIN ASSEMBLY |
JP2005221076 | SOUND INSULATING MATERIAL FOR ELBOW PART |
ISHIKAWA HIROSHI
JPS5066042A | 1975-06-04 | |||
JPS5869068U | 1983-05-11 |