Re: Sinks and vents
Posted by LonnythePlumber on April 18, 2003 at 21:41:00:
In response to Re: Sinks and vents
: This a primitive drawing of the drain system.

: . |
: . |
: . |
: . /|
: . | |
: . | | BSink2 KSink2
: . | |____|_________|
: . | |
: . | | 2nd Floor
: .===============================
: . | |
: . | |
: . | |
: . | |
: . | |
: .BSink1| | KSink1
: . |___| | |
: . | | |
: . | | |
: . \ | |
: . | |
: . | |
: . | | 1st Floor
: .===============================
: . | |
: . | |
: . |________|
: . |
: . | <----to main drain

:
: Here's the story....
: I had a plumber come over and do whatever was neccesary for a CO.
: When I got the 2nd floor apartment rented some 6 months later...
: BSink1 will back-up, over flow, and then drain slowly.
: I have snaked the pipes from BSink2 to basement, and BSink1 to basement.
: I also snaked out the pipe in the basement from below the KSink1 connection out to street,
: and from the basement floor cleanout to street.
: This did not reveal any major blockages, and the problem still occured.
: I then tried chemicals in BSink1 and KSink1, and the problem still occurs.
: I am thinking:
: a) BSink1 is not connected to line correctly, it should be tied in below the KSink1 connection.
: or
: b) BSink1 is not connected to line correctly, the vent line should break into drain line above sinks BSink1 and KSink1.

: All lines into sinks are 1 1/2" PVC.
: All sinks have "P" or "S" traps, made of PVC.
: All risers are 2" PVC.

: Any suggestions or comments would be appreciated.
: Thank you.
: nohome@optonline.com

a) it would not make a difference whether the lavatory is tied into the drain stack above or below the kitchen sink.
b) The vent line above the first floor sinks should continue up above the second floor sinks before tieing in together as you have shown. The Second floor drain line should continue down into the basement before the first floor drains tie into it and the house drain.
I presume you are indicating that the second floor water comes up into the first floor sinks.
If it is only the first floors own water that will not drain out then you are not getting your house drain open. You need to use a 3 1/2" minimum blade on a four inch line. An 1 1/2"blade will not open a house sewer.
I do not see the vent for the first floor kitchen sink and the second floor sinks should tie into the stack seperately. You cannot put two sinks on one trap arm. I presume these are diagram inadequacies.
LonnythePlumber





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