Yeah that's why I said it doesn't have to go outside. I don't think it has to go outside in any code. If that was in IPC I would be shocked.
That one could go through the floor and discharge onto the basement floor. Into a sump pit or into any other place imaginable. They only have to have an air gap and then can go about anywhere as long as it's not discharging onto a sub floor or ceiling, or trapped.
They all dump straight onto the basement floors around here. Or a sump pit.
Hi John, in reference to your statement on t and p not requiring to be outside the building I believe this has come up before. And scratching my head I seem to remember it being a requirement in UPC for t and p to drain to outside the building. Over the years there have been subtle modification to this area of UPC code and my 2000 code book states relief valve tubing "shall extend from the valve to the outside of building not more than 2 foot nor less than 6 inches above ground or flood level of surrounding area" the code goes on to say the line can terminate in other "approved locations" but those locations aren't mentioned. those of us that were forced to live by this code generally took it for granted that you either run your t&p outside or better have inspectors blessing it wasn't merrily a choice of running it whichever way you chose.
But that wording has changed and generally floor sinks and drains can be used without specific permission to approve the location.
I think a lot of us in UPC are a little in the dark on this Its been bugging me had to look it up.
Modern code I too know of none that requires t and p to go outside of building though that's generally where they go on homes in Ca.
To the OP I see major issue at kitchen sink . as an owner of a 100 year old condo you might want to study up on who is responsible for the various parts of the building and make sure HOA covers their share of expense . its your choice fix it or don't