Abstract: A building drainage system including: a drainage stack passing through stories in the vertical direction; appliance drainage pipes connected to water-service terminal appliances on each of the stories; and a combined joint for connecting the appliance drainage pipes provided on each of the stories to the drainage stack. In this system, the combined joint for connecting the appliance drainage pipes provided on each of the stories to the drainage stack is at a level lower than that of a floor slab of the story, to sufficiently give a vertical velocity component to a fluid flowing in each of the appliance drainage pipes, thereby combining the fluid to a fluid flowing in the drainage stack.

Abstract: A cultivation vessel for fungi has a wide-mouthed upper opening and a lower opening, each of which is detachably covered by a respective top and bottom end cap. One or more such vessels are prepared, sawdust and rice barn are packed as the culture medium therein, and a mushroom spawn is inoculated thereon to spread and culture the hypha. After culturing for about 20 days, the culture mediums are taken out and further successively cultured for about 3 to 30 days in contact with each other to develop the fruit bodies.