View Full Version : Code v. reality: 1.5" drain
ToolsRMe
08-29-2006, 12:48 PM
I have an existing 1.5" drain for a sink. I want to add a Fisher & Paykel dish drawer (pair) to that line.
My contactor (I've worked with him for more than 10 years and I have a lot of respect for him) says that a 1.5" drain is plenty and that code is total overkill.
I want to make sure before I install the dishwasher.
Any thoughts?
Mikey
08-29-2006, 02:02 PM
What code requires more than 1.5"?
prashster
08-29-2006, 02:13 PM
Find out what code is. Ask your town inspector. A lot of things not to code will 'work'. But it may come back to bite you if you sell or have an accident that you have to file an insurance claim for.
Also, how's he planning to vent?
Winslow
08-29-2006, 10:17 PM
by the UPC the kitchen sink drain needs to be 2" (2x11/2x11/2 san tee)whether you have a dishwasher or not. You shouldn't have any problems with 11/2 drain, as long as it is open (no partial clog), a disposer might cause problems though
ToolsRMe
08-30-2006, 05:15 AM
Also, how's he planning to vent?
Studer vent. It's legal where I live.
ToolsRMe
08-30-2006, 05:18 AM
by the UPC the kitchen sink drain needs to be 2" (2x11/2x11/2 san tee)whether you have a dishwasher or not. You shouldn't have any problems with 11/2 drain, as long as it is open (no partial clog), a disposer might cause problems though
Why would a disposer cause a problem?
Winslow
08-30-2006, 11:15 PM
Why would a disposer cause a problem?
With a disposer you will be running a lot more solid waste through the line and 11/2 " over time will be a clog issue. Just from personal experience I notice that 11/2 with a disposer is a bad combination.
A disposer and a 1" 1/2" waste line are absolutly OK . It would be nice to have 2" but it is not needed .
People need to scrape what they can into the trash, NOT use the disposer as a sewage grinder.
geniescience
09-03-2006, 02:22 PM
how far is the stack?
You've already got two strikes against you if you use the 1.5" diameter pipe and the Studor AAV vent. So, ToolsrMe, you probably want to know that the length of pipe is also a factor in draining. If the stack is in the wall that the kitchen vanity hangs off of, you have a short distance. That's only a ball and not a third strike.:)
david