markb

Through all my apprentiship training and code book studying I have not been able to find any codes against what I am trying to do.


My building drain went to the middle of the home 4" to my 4"x3" c/o to open air. I then continued 3" underground to pick up a 3 piece bathroom. On this 3" branch, I connected a 2" pipe w/C/O, to pick up a kitchen sink on the second floor.

Inspector says that I need to run 4" to my kitchen sink connection ( I.e. 4x2 c/o) because the drain is passing through one floor.


I don't see a need to run 4" pipe just for a kitchen sink on the second floor, but he insists that all pipes having a drain from the floor above must be 4" underground.

I am looking for any code references (preferably OBC 2006, or NPC) that can help me explain to him my point. Was this a code requirement years ago and maybe he is not aware of the code changes?

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AKdaplumba

National code is what I use.

You need a 4" c/o on the farthest stack from the sewer( where it enters the house) If you have a pic it would be helpful and your saying you're coming in the middle of the house.

Or for your kitchen stack, run 4" to your c/o 4x3 c/o 3x2 bushing run 2" to the kit. Never heard of anyone needing 4" going to a second floor to pic up 1.5 FU.

send me a pic and Im sure I can help you out.

markb

http://photos-f.ak.fbcdn.net/hphotos..._1767020_n.jpgHere is the link to a drawing.

Was there some old old code that said you had to do this? The inspector is a old grumpy man. He once said that I couldn't wet vent two basins (two ty's ontop of one another) and told me that circuit venting can not be installed with 1 1/2 circuit and relief vents!

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Never give in. Never give in. Never, never, never, never--in nothing, great or small, large or petty--never give in, except to convictions of honor and good sense. Never yield to force. Never yield to the apparently overwhelming might of the enemy.
- Winston Churchill

markb

... lol just remembered this one...

He once offered some "advice" on some sump pits I installed. He said to use a TY (as a saitary T) instead of a 90 inside of the pit. That way you get better flow because you vent the pit...Some of these city guys I just don't know about lol

__________________
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Never give in. Never give in. Never, never, never, never--in nothing, great or small, large or petty--never give in, except to convictions of honor and good sense. Never yield to force. Never yield to the apparently overwhelming might of the enemy.
- Winston Churchill

A Good Plumber

Mark,
If I understand it correctly, I agree with the inspector.

We use the Uniform Plumbing code here and it says you need to have an end of line CO that is full size. In your case you would need to extend the 4" like the inspector says to the kitchen riser. You then install an accessible full size 4" CO at which point you reduce the vertical riser to 2" to pick up the sink.

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markb

doesn't that sounds a little bit over kill though? If I didn't have the kitchen sink there, the branch would continue to be 3" right? (in your code). or would you continue it 4" and then branch off 3" for the bathroom.

__________________
--
Never give in. Never give in. Never, never, never, never--in nothing, great or small, large or petty--never give in, except to convictions of honor and good sense. Never yield to force. Never yield to the apparently overwhelming might of the enemy.
- Winston Churchill

AKdaplumba

I agree with the inspector. 4"c/o to the farthest stack for the building drain. From there you bush down to 2".

The existing is wrong by todays code.

AKdaplumba

if the kitchen wasnt there the 4x3 c/o would be fine where it is. 4" wye, bush the end to 3" to pick up the bathroom.

Just understand farthest stack if your 4" c/o

Miguel

I'd have to go with the inspector on htis too, if I'm understanding your drwg correctly. (Where you show 4x3 c/o's I assume they are all stacks to be fitted w/ 3" cleanouts?)

Depending on the room you have, if you could get 45° (or less) change of direction to the first stack then 4" right to the base w/ 4" CO. Then simply run a 3" branch to the basement bathroom group and an 1-1/2" (or 2" if it's req'd by municipality - it is here) to pickup the KS on the floor above.

Cleanouts must be same size as the pipe they serve (downstream) to max 4". (ie: you could put a 4" CO on a 6" building drain, but NOT a 3" CO on a 4" BD.)

Also, watch for backflood protection. If required there, or you were going to use it anyway, they need accessible cleanouts too.

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OldSchool

From your description even though a little not clear seems that you have done it right. 4" to main building stack with 4' clean out at base of stack then min 3" depending on whats above. Ground work can be 3" to basement washroom and 2" line to base of kitchen stack with 2" line clean out at base of stack. That inspector is a little confused as there is one main stack and all others are just stacks plumbed in size according to fixture units. The code has not changed much form the original ontario plumbing code.

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