It is actually LH 1500/0.1 cause the storage is incidental. But the pump is required for the Residential portion 4th floor due to insufficient 25% margin. The AHJ is not flexible.
So you see no code problems with having two zones in this way. The AHJ is telling me that a single pump for...
I have a four story building with residential use on 1 thru 4 and incidental storage in the basement. The system is supply by the local utility. Due to local peculiarities of the water distribution system the city requires a 33% margin on pressure for all systems in the area. I have...