StevenT Posted January 22, 2009 Report Posted January 22, 2009 I came across this P trap today while inspecting a 220,000 SF (168 unit) apartment building. Imagine the size of thr dumps that it takes to clog it. [:-crazy] Actually, it's part of the storm drain system. Click to View 51.85 KB
Darren Posted January 22, 2009 Report Posted January 22, 2009 It looks like a whole house trap; is the sewer a combo (sanitary & storm)?
fqp25 Posted January 24, 2009 Report Posted January 24, 2009 Are those drain lines for roof drains? I have seen roof drain lines going into the combination sewer system in Chicago. They had a big cast iron catch basin, before the line left the building. Those catch basins (usually 36" deep) were always filled with gravel/pebbles from the roof. Frank
StevenT Posted January 24, 2009 Author Report Posted January 24, 2009 There are roof and patio drains. I built a system like you described in a laundromat. In NYC... in most cases storm drains are not allowed to drain into a sanitary sewer. It adds too much water to the sewerage treatment plants. If you don't have a storm sewer (new construction), you have to install dry wells. That is another scam story.
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