New York City question (Condensate discharge temps) ME

bob young

150 degree is max unless it was changed by new code. city mains cast iron , clay [ vitreous china ] or concrete. 180* ok for indirect for dishwasher

Mark Eatherton

What does the code say, and why?

I have a person who is asking me how he can reduce his water bill on a system that gets its steam from ConEd. It was my understanding that the 140 max discharge limit was based on the use of Orangeburg (asphaltic based piping) pipes in the drains. Are the city mains in NY something other than Orangeburg that could withstand a higher temperature?

Also, is anyone in NY (JohnNY?) interested in providing a bid for wste heat recovery off of a condensate system (DHW pre heat)?

TIA

ME

Mark Eatherton

Thanks Bob,

It use to be 140 for Denver. So, if the building sewer is not orangeburg, can you see a reason for dilution water being introduced into the condensate stream to cool it? One it hits the city main, I am SURE it will be cooled by the upstream effluent. No? Other than the obvious waste of BTU's, the consequential waste of our most precious resource (water) seems silly...

ME

bob young

condensate drainage

i agree. as long as its not more than 150 degrees , i would say no further dilution would be necessary. i checked the code book & see no other regulation related to that. always a local law is a possiblity though. i do not know of any orangeburg in nyc . asbestos cement maybe ----but thats another story. i will check the new code book tomorrow when i get to the office.

MikeyB

condensate

We were always taught to keep our temp below 150 degrees in our buildings, I remember Con Ed telling us about this in a seminar a while back, Alot of buildings in NYC send the condensate through some kind of heat exchanger (water heater) before pumping in into the city sewer. I am looking into installing a water meter on my cw domestic line that tempers the hot condensate to keep track of it, rumer is NYC water rates are going up as well. Mark E. any trips planned to NYC for a seminar anytime in the near future?

bob young

I.P.C.

nyc adapted to I.P.C. code recently , Mark , so i guess we are now at 140 * in n.y.c.

Mad Dog_2

Johnny is Out of Town right now, Mark, but I'm sure he'd be

interested. Mad Dog

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