Vent Lines For Bathrooms / Kitchen Sink

amper26

I have a toilet that is going down very slow, it is going into a 4" cast iron at the back of the row with the tub ahead of it and then the sink. The sink is tee d off with a 2" line for a vent, however that line goes about 15' and makes 3 90's before it tees into a 4" vent. Is this the cause of the slow flush? Is this enough venting for all 3 devices?

Also redoing a kitchen sink, it has a 2" after the trap that joins into a 2" drain with a 2" tee can or should I use a "Y" sweep instead of a tee. Just because of the downward angle it may give to the flow. Of course this is happening about 1' after the trap.

Ron The Plumber

Your trade is plumber, come on people, this site is for trade talk and not for DIY'er. Take it over to the sister site diychatroom.com.

ProWallGuy

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