Esobocinski
New Member
Greetings all, and thanks for keeping this one of the best DIY resources anywhere.
Background: We're doing a complete kitchen rebuild. I have a general contractor but I'm doing the utilities. The kitchen sink will be along a new exterior wall with 2x6 framing, and will be a deep unbalanced double sink with one disposal. The drain will be PVC, the supplies will be copper.
I hate plumbing coming up through cabinet floors, but I live in Michigan where freezing is a concern. I don't see any Michigan code rules forbidding supply plumbing in an exterior wall, and the wall will be well-insulated, but other discussions that I read here have lead me to believe that I should not do it unless absolutely necessary, and that I should just swallow hard and go through the floor anyway.
I'll be stuck with an AAV and so don't need to worry about vent pipe: A large window above the sink prevents me from getting a vent in the wall vertically 6" above the flood rim while also getting 1/4" slope for 6 ft horizontally. I'm structurally blocked from running the drain horizontally in the wall to a new drain stack beside the window. The inspector shot down my suggestion for a modified island vent. (He won't say why -- he hates DIY'ers and tells us as little as he possibly can). The inspector likes AAVs. I hate them but I don't see a way to do avoid it.
So, the questions:
Am I correct figuring that I'd best go through the floor? Or, is that paranoid with modern insulation and I could go up the wall? I assume that it has to be all one or the other in order to allow the cabinet to be slid over them, right?
Assuming floor installation, what is the minimum distance that I should put between the exterior studs (or finished wall) and the backs of the pipes? In other words, what's the minimum distance that lets the cabinet back slip behind the pipes and still allow adequate working room? I'm basically trying to lose as little cabinet space to plumbing as possible without being stupid.
What is the best placement for both supplies and the drain? My first inclination is to pull the drain up dead center along the back wall to a tee at 14-15". The supplies would be offset 4" on either side up to 18", with a tee to a dishwasher shutoff. Basically, I'd be mimicking a traditional wall configuration for a kitchen sink even though it's coming through the floor. Good idea? Should I do something else?
One trap or two? I'm fine putting in a double san-t for separate traps if that makes my life easier.
Thanks.
Background: We're doing a complete kitchen rebuild. I have a general contractor but I'm doing the utilities. The kitchen sink will be along a new exterior wall with 2x6 framing, and will be a deep unbalanced double sink with one disposal. The drain will be PVC, the supplies will be copper.
I hate plumbing coming up through cabinet floors, but I live in Michigan where freezing is a concern. I don't see any Michigan code rules forbidding supply plumbing in an exterior wall, and the wall will be well-insulated, but other discussions that I read here have lead me to believe that I should not do it unless absolutely necessary, and that I should just swallow hard and go through the floor anyway.
I'll be stuck with an AAV and so don't need to worry about vent pipe: A large window above the sink prevents me from getting a vent in the wall vertically 6" above the flood rim while also getting 1/4" slope for 6 ft horizontally. I'm structurally blocked from running the drain horizontally in the wall to a new drain stack beside the window. The inspector shot down my suggestion for a modified island vent. (He won't say why -- he hates DIY'ers and tells us as little as he possibly can). The inspector likes AAVs. I hate them but I don't see a way to do avoid it.
So, the questions:
Am I correct figuring that I'd best go through the floor? Or, is that paranoid with modern insulation and I could go up the wall? I assume that it has to be all one or the other in order to allow the cabinet to be slid over them, right?
Assuming floor installation, what is the minimum distance that I should put between the exterior studs (or finished wall) and the backs of the pipes? In other words, what's the minimum distance that lets the cabinet back slip behind the pipes and still allow adequate working room? I'm basically trying to lose as little cabinet space to plumbing as possible without being stupid.
What is the best placement for both supplies and the drain? My first inclination is to pull the drain up dead center along the back wall to a tee at 14-15". The supplies would be offset 4" on either side up to 18", with a tee to a dishwasher shutoff. Basically, I'd be mimicking a traditional wall configuration for a kitchen sink even though it's coming through the floor. Good idea? Should I do something else?
One trap or two? I'm fine putting in a double san-t for separate traps if that makes my life easier.
Thanks.