抄録
For the maintenance of water-quality, the water service systems in multiple dwelling houses on the Tokyo metropolitan district had let to be changed from the receiver tank water service systems to the direct water service systems raised the pressure by pumps. In this paper the authors investigated that the multistory buildings connected with bore 75mm affected the building or distributing pipe. As a result, the authors made out that the water service pipe in the connecting buildings are not affected by the direct water service systems raised the pressure by pumps. And the consumption of electric energy per 1m^3 decreased from a change of the water service systems.
