In the reference guide of LEED ID+C V4, it is mentioned under prerequisite the newly installed plumbing fixtures must be according to the Table 6 flow rates. The % savings must be shown for each fixture from LEED baseline and all fixtures must be water sense labelled.
However , there are 2 compliances path mentioned under the same requirement, Compliance path 1 Prescriptive: is for % savings achieved for each fixture , Compliance path 2: usage based calculation i.e. showing cummulative savings of atleast 20% based on usage , occupancy etc.
Currently in India water sense labelling is not followed.
I have attempted by compliance path 2 by showing % savings on usage basis, for prerequisite and for credit.
I want to know is it still mandatory for fixtures to follow the flow rates in Table 6 , or usage based calculation and manufacturer cut sheet with flow rate data sufficient???
- Project is in India; India does not have an equivalent program to Watersense, therefore, the project must meet at least a 20% reduction in fixture rates shown as baseline in the Ref Guide.
- Since you are using Path 2, no, Table 6 does not apply as it is there as guidance for Path 1.
- For Path 2, you would submit the water use reduction calculator, with fixture cut sheets showing rates. You may also want to reiterate to the reviewer that the Watersense requirement does not apply.
Hope that helps.