الصادق بابكر حسن سليمانمحمد معتصم خضر محمدمشعل محمد عبدالله الحاج نور2023-11-142023-11-142023-02-01https://ds.eaeu.edu.sd/handle/10.58971/270Abstract : This research includes the design of feeding and sewage pipes, in addition to the of the Septic Tank, for a multi-storey building consisting of nine floors and a ground floor in the city of Atbara (Al-Murabat) district, where the consumption rate of the building was calculated in three different ways . The building was divided into two lines to supply the building, and the diameters of the vertical pipes were calculated as (25.4 -57.15 ) mm, equivalent to (1 -2.25 ) inches, and the horizontal pipes ( 38.1-12.7 mm) equivalent to ( 0.5_1.5 ) inches, according to the methods used according to the first method (Hook method) (Howick) and the second (Escritt) method, which depends on the inclination of the hydraulic pressure line, the feed rate of the devices, and the calculation of the diameters of the vertical liquid waste pipes for Line ( inches) equivalent to mm (76.2 ) and the horizontal (5 inches) equivalent to mm ( 127) As for Line vertical ( 4 inches) equivalent to mm ( 101.6) and horizontal ( inches) equivalent to mm (101.6 ) in addition to the design of the Septic Tank, (5 *2.5 *3 ) mother