Can we acquire all credit points in WEc2, ID, WEpc10?

Hello Heesun, Waste water generated by the LEED building's factory equipment (process water) would qualify as non-potable and would contibute to WEp1, WEc2, and WEc3 along with pilot credit WEpc10. Assuming the calculated outcome meets the targeted thresholds for all these credits...YES, you are eligible for achievement of them all. However, I am not understanding one detail - Can you clarify the sequence you are describing with the statement "Factory process water is drained away in the generation process of primary reverse osmotic system."? Calculations would need to be performed to estimate the annual volume of process water available and the overall regulated fixture demand for the building occupants to determine whether 50%-100% of flush fixture demand would be met by this water source...although its hard to imagine there would not be more than enough process waste water available! Note- the LEED credit forms do not readily incorporate the non-potable water contibutions to credit performance. You will need to create a supporting document to show these calculations - refer to guidance outlined here: http://www.usgbc.org/Docs/Archive/General/Docs6493.pdf Best of luck to you!

Our project is an administrative building. The projecte has already achieved WEc1, WEc2, WEc3 and their ID for exemplary performance. The building reuses non-potable water from rainwater. This rainwater is used in toilets and urinals. We are going to pursue pilot credit 10, using option 2, as I have understood by reading the comments above that in our case we can also acquire the pilot credit 10.