I'm trying to figure out how many water supply fixture units (WSFU) can fit off of my CPVC supply lines. I looked at the tables in the 2015 NSP , but where I'm confused is figuring out where that is calculated. Example -
I have a 3/4" supply line that tees to two 1/2" branches. On one branch I have a dishwasher and kitchen sink, and on the other I have a bathroom with a 1.6gpm gravity toilet and a sink. I'd like to T the connection to the bathroom so that it'll have 1/2" going to a bar sink and the other 1/2" going to the bathroom as before.
The question is, when doing the calculation, am I looking at only the WFUs off of the 1/2" line that is going to the bathroom, or do I have to take into consideration the line that is going to the kitchen as well?
main =========T------------T---------- Bar Sink | | kitchen half bath = -> 3/4" - & | -> 1/2" CPVC SDR11 T -> tee intersection