Domestic water demand based on the building use type
Domestic water demand based on the building use type
(OP)
Are there any resources available to give a rough estimate of the water demand based on the building use and the floor area? I don't want to go into too much detail with the number of employees or the number of fixtures. For example I have a 15,000 SF pharmacy and a 5,000 SF restaurant and I'm trying to figure out the estimated water use in gallons per day.





RE: Domestic water demand based on the building use type
RE: Domestic water demand based on the building use type
An architect may have a rough idea based on square footage and end use but could give you a more accurate answer with an actual building design where the number of fixtures can be identified. Also with the trend toward sustainable/green building, more water conservation and recycling measures will affect water demand.
RE: Domestic water demand based on the building use type
You can estimate the restaurant flow at 10 gallons per person per day. Assume 3 meals per hour. ONe hour at lunch. Maybe 3 hours at dinner. Each person will need 6 to 8 square feet per seat.
The pharmacy restroom would be about 100 gallons per day total.