After receiving great opinions with my insulation question, I thought I
pose another problem I'm having.
I currently have what's called an unvented 's' trap under my kitchen
sink. To me, it doesn't look quite an 's' trap but a hybrid of a 's'
and 'p' trap. I'm having major drainage issues from this sink, and am
considering my options. Also, I am converting from a conventional
mounted sink to an undermount sink (replacing with granite). AND I
have a diswasher attached to the drain (which backs up during the
dishwasher cycle) To describe the look of the drain-- it leaves the
sink straight down, hits the elbow, returns up and flattens out for
about 4" and then turnd down to the drain in the floor. It also
appears that the pipe running from the sink to the floor drain is 1
1/4", because I measured the outer diameter and it is 1 1/5" and it is
converted to a larger pipe in the floor drain (I think 1 1/2" or 2")
via a rubber coupling.
My question is, how can I make this into a genuine 'p' trap so it's 1.
legal and 2. better draining. Also, with an undermount sink, will
there be major issues with the drainage? Should I replace the smaller
drain with a larger diameter pipe?
Thanks for the help.