Helping a great friend start due diligence on possible purchase of a 12-unit 2-story apt. bldg., CBS-on-slab (aka So Fla hurricane bunker), and noticed that the HVAC condensate drains are (apparently) combined, 4 into a single exterior outlet, for each "quad-stack" of 4 apts., i.e. 2-up, 2-down, common plumbing wall... is that "code compliant"? Original build date of 1961 makes it possible that the place had wall-bangers before the current central HVAC scheme... grandfathering??

>>>> BUT the real puzzler is: I don't see any outlets AT ALL for the T&P relief valves--each unit has its own 30 gal. electric WH, T&P pipe penetrates adjacent drywall (common plumbing wall) and goes... WHERE?

Please tell me they're not combined with the HVAC drip drains!?!? And if they are just plumbed to the sewer, doesn't that defeat the "notice even the slightest discharge" principle seen in single-family residential?

Where to find the answer... hmmmm... ;')

(PS: since 2001 I was 'Fixizin' on the longstanding ths-gardenweb... not sure I like this replacement one bit... is "the gang" still here???)