JeanetteOki
New Member
Kitchen remodel. I don't have a contractor and am subbing out the plumbing.
I have a peninsula that had a split counter with a bar level and a sink level. The bar is gone (demo'd) and I will be making the sink countertop (about 48" by 90") all one level. I attached a very general drawing I made using the plumber's description of his proposed plan. Missing, is the slow slope of the horizontal which I assume the plumber will do correctly and whatever clean outs he may put in.
My question is about the pipe sizing. See my drawing (dotted lines mean it is behind the cabinet wall in a pony wall at the center of the 48" x 90" countertop). The plumber says the horizontal waste line will be 1 1/2 inches and the drain pipe will be 2 inches, (see drain at the far left that meets the vertical vent pipe).
Shouldn't the waste line, (the horizontal pipe) be 2x the size of the pea trap pipes, which are usually 1 1/2, right? So, that it can carry more water and the flow from the sink can easily drain into it, "ensuring a free flow of air above the effluent"?
From: https://www.finehomebuilding.com/project-guides/plumbing/a-new-old-way-to-vent-a-kitchen-island
That would mean a 3" waste line pipe, yes or no? I am having trouble finding other examples or schematas of this waste / drain combination. Or do I have it wrong and the pea trap pipe is supposed to be twice the size of the sink outlet?
Other plumbers recommended the high loop vent, which won't fit in my sink cabinet with an apron sink, apron sink framing, and the RO system. I could use an AAV, but we like the physics of a vent pipe, tried and true.
FYI The vertical vent pipe above the tie-in is galvanized and I decided today that will be fully replaced with an ABS vertical. Today, after drawing attached was drawn, demo was done of a section of the horizontal vent pipe and it was filled with rust and corroded metal. And, it had a plumbing snake in there that continues up the pipe. WHAT?!
I have a peninsula that had a split counter with a bar level and a sink level. The bar is gone (demo'd) and I will be making the sink countertop (about 48" by 90") all one level. I attached a very general drawing I made using the plumber's description of his proposed plan. Missing, is the slow slope of the horizontal which I assume the plumber will do correctly and whatever clean outs he may put in.
My question is about the pipe sizing. See my drawing (dotted lines mean it is behind the cabinet wall in a pony wall at the center of the 48" x 90" countertop). The plumber says the horizontal waste line will be 1 1/2 inches and the drain pipe will be 2 inches, (see drain at the far left that meets the vertical vent pipe).
Shouldn't the waste line, (the horizontal pipe) be 2x the size of the pea trap pipes, which are usually 1 1/2, right? So, that it can carry more water and the flow from the sink can easily drain into it, "ensuring a free flow of air above the effluent"?
From: https://www.finehomebuilding.com/project-guides/plumbing/a-new-old-way-to-vent-a-kitchen-island
That would mean a 3" waste line pipe, yes or no? I am having trouble finding other examples or schematas of this waste / drain combination. Or do I have it wrong and the pea trap pipe is supposed to be twice the size of the sink outlet?
Other plumbers recommended the high loop vent, which won't fit in my sink cabinet with an apron sink, apron sink framing, and the RO system. I could use an AAV, but we like the physics of a vent pipe, tried and true.
FYI The vertical vent pipe above the tie-in is galvanized and I decided today that will be fully replaced with an ABS vertical. Today, after drawing attached was drawn, demo was done of a section of the horizontal vent pipe and it was filled with rust and corroded metal. And, it had a plumbing snake in there that continues up the pipe. WHAT?!
Attachments
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