STUDI FISIBILITAS DESAIN PEMANFAATAN AIR HUJAN SEBAGAI PEMBILAS KLOSET DI GEDUNG INTEGRASI DAN LAB. PLUMBING PPNS
Abstract - Integration Building is one of the new buildings that has been built by the Shipbuilding Institute of Polytechnic Surabaya (PPNS) as a form of commitment to improve the quality of education for graduates of Shipbuilding Institute of Polytechnic Surabaya In the future, the piping system laboratory will be equipped with piping clean water, dirty water, gas household and rainwater treatment. The main focus of this research is the rainwater piping system because the multi-storey rainwater system is very much in accordance with the condition of the integration building which will also be applied to the piping system laboratory as well as the facilities that are often used by students. Before installing the rainwater piping system, a practicum booth and piping system will be designed in accordance with the applicable standards as well as the making of lab rooms, and of course scheduling of booths and installations and details of the total costs needed to estimate when the booth is ready can adjust to existing campus funds. From the design of the rainwater piping system. Then the need for prism roof area of 136,6248 m², flat roof of 403,811 m², rainwater volume of 2,703405 m³, tank capacity of 8,200 L, toilet flushing needs of 7560 liters, and pump power of 1,132 HP. Calculation of duration by method Project Network Planning is known to take 93 days to complete this plumbing system project. With a working duration of 8 hours per day and 5 working days a week. RAB the total required for this project is Rp 167.655.607,53. Where this RAB is a rough RAB because it does not include costs for excavation work for making rainwater collection tanks.