5 ms·
Because you need to vent the pipes. Otherwise the sewer system would just be a giant vacuum pump. It's even described in the article you mention. https://en.m
by mshook 7y ago
Because you need to vent the pipes. Otherwise the sewer system would just be a giant vacuum pump.
It's even described in the article you mention.
https://en.m.wikipedia.org/wiki/Drain-waste-vent_system https://en.m.wikipedia.org/wiki/Drain-waste-vent_system
- flaviu2 7y agoI'm familiar with vents, but indoor vents are basically one-way air valves. I don't know if this is required by code, but it's definitely common practice (you don't want poop smell coming out of your vents)
- Scoundreller 7y agoVent stacks need to be above that roof’s line, but your building might be next door and taller with open windows downwind. Or a crack in the stack.
- BubRoss 7y agoThat isn't a good explanation, since venting should exit far above the building.