Calculating Wastewater Flow from an Art Museum

[ChipperB]

I need to size a grinder pump for an Art Museum. Is there a way to estimate flows based on fixture count? Or could one use a certain gpm per square foot of building space.
Eveything I have found online references flow calcs based on residential flow.

 

[bimr]

You will get the most accurate estimate if you use the fixture count method.

 

[ChipperB]

The Art Museum has 5 sinks, 1 mop sink, 9 lavatorys, 8 toilets, and 2 urinals. What are the flow vales assigned to these type of fixtures?

 

[ChipperB]

vales should be values

 

[KiwiMace]

Your local plumbing code will tell you exactly that.

 

[bimr]

Lavatory = 2 DFU
Water Closet = 4 DFU
Sink Service = 2 DFU
Urinal Pedestal = 6 DFU
Mop Sink = 2 DFU

2 DFU = 1 GPM.

Reference: Piping Handbook

These numbers will vary somewhat on the type of fixture and the age of the fixture. Newer fixtures will use less water.