Water Demand Calculation as per IPC - Domestic
# Plumbing Fixture Qty WSFU Total WSFU
1 Lavatories 22 2 44
2 Hose Bib 8 1.5 12
3 Hand Spray 20 1.5 30
4 Kitchen Sink 0 0
5 Service Sink 0 0
0
Total WSFU 86
Total GPM 41
Diversity Factor 30% 12.3
Total Water Demand in Litres 27896.4
Water Demand Calculation as per IPC - Flushing
# Plumbing Fixture Qty WSFU Total WSFU
1 Water Closet 20 5 100
2 Water Bidet 0 0 0
3 Urinal 10 3 30
4 0
5 0
0
Total WSFU 130
Total GPM 52.5
Diversity Factor 30% 15.75
Total Water Demand in Litres 35721
Water Tank Sizing
As per NBC :
Domestic Underground Water Tank Storage = 2-3 Days
Domestic Overhead Water Tank Storage = ½ Day
Domestic Water Demand for One Day = 27896.4 Ltrs
Flushing Water Demand for One Day = 35721 Ltrs
Volume of Domestic Underground water tank ( = 55792.8 Ltrs
Volume of Domestic Overhaed tank (OHT) = 13948.2 Ltrs
Volume of Flushing Underground water tank (U = 71442 Ltrs
Volume of Flushing Overhaed tank (OHT) = 17860.5 Ltrs