Hey guys, i have a question about a vent that i saw today. the sanitary wyes used were installed backwards (running upstream) which seems like it would restrict air flow. Is this plausable?
Air is a gas the moves because of pressure differences, NOT GRAVITY, which means it works a lot different than water. For esthetic purposes ONLY the fittings are installed differently than if they were in a water drain situation, meaning, if your terms "backwards" and "upstream" are used properly, the fittings are correct.
Reason also to install it "backwards" is to make sure when someone is snaking the line the snake (cable) will not go up the vent pipe .
Actually, if installed properly, the snake will ALWAYS go up the vent pipe, once it gets started that way.
Aren't they also set up that way so any water getting in through the vent during heavy rain makes it to the sewer or septic?
The FAI I install the Wye and 1/8 bend backwards The only water that may enter the vent is though the roof terminal
Since you are not concerned about the fluid's velocity, IF the PIPES are installed with pitch the water has nowhere to go EXCEPT to the sewer.
