Stink Pipe Question

Just wondering what the regulations are on stink pipes.

If I have a stink pipe attached to a sewerage line, does the toilet have to be "upstream" or "downstream" relative to the stink pipe? Does it matter?

I would think it doesn't really matter, but probably best if the toilet lived downstream of the stink pipe. That way a "large deposit" into the sewerage pipe would be less likely to cause a vacuum when the toilet is flushed.

At the same time I heard that stink pipes are no longer really required by law in Victoria. I find that logically hard to believe.

I am looking at installing a toilet, but the toilet will be the most upstream connection in the sewerage line. Wondering if that is a good idea.


(Wish the AS/NZ 3500 plumping standards were a tad cheaper.... I'd assume they would answer all my questions. Anyone got a PDF version willing to share? :) )

Doesn't really matter if u/s or d/s as long as the air being pushed from the dunny has somewhere to go.

How about the fall of the sewerage pipe. Is there a standard for that?

There is a standard for everythimg concerning plumbing, which is then superceded by your state codes.

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Originally Posted by wonderplumb

There is a standard for everythimg concerning plumbing, which is then superceded by your state codes.

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...which is then superceded by how I decide to do it :)

(which is why I want to know how to do it properly)

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Originally Posted by Gooner

...which is then superceded by how I decide to do it :)

(which is why I want to know how to do it properly)

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Call a plumber, :((

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Originally Posted by bricks

Call a plumber, :((

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I tried.

Holidays. Not interested. Left messages. "I'll get back to you"...."Try calling this guy. He does small jobs". "Perhaps at the end of the month".

I was already relutant to part with the $$ to begin with for what I considered a simple job. So far I have done half the job for a fraction of the price, and what I have done so far I am confident is of a good standard.

I hope I don't have the same problem with the electrician.

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Originally Posted by Gooner

I hope I don't have the same problem with the electrician.

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:rofl::rofl::rofl:

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Originally Posted by SilentButDeadly

Doesn't really matter if u/s or d/s as long as the air being pushed from the dunny has somewhere to go.

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Ok I'll give you a tip- this ain't right.

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Originally Posted by bricks

Ok I'll give you a tip- this ain't right.

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Thanks for the help :2tsup:

I need more information if im going to give you an answer gooner,

• drawing of drainage to your house
• drawing of drainage under your house
• Photo's
• Layout of bathroom

Sorry to be a bit short but, where does the stink pipe go is kinda like saying where is osama bin laden, without the right information I cant tell you./

Quote:

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Originally Posted by bricks

I need more information if im going to give you an answer gooner,

• drawing of drainage to your house
• drawing of drainage under your house
• Photo's
• Layout of bathroom

Sorry to be a bit short but, where does the stink pipe go is kinda like saying where is osama bin laden, without the right information I cant tell you./

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Heyya Bricks. I was mainly asking if it needs to go upstream, downstream or doesn't matter where it is in relation to the toilet as long as there is a vent pipe somewhere. Perhaps the regulations are more specific than that. Thats what I want to find out. If the answer is not simple I will actually buy the plumbing and drainage standard from the SAI website.

I have attached a rather embarrassingly crude image of the drainage on this side of the house. (Best I could do while trying to calm a crying baby in one arm). The part in red is what I am changing. Therefore, basically moving a sink from one side of the room to the other, (trivial), and adding a toilet at the end of the sewerage line.

You can see the existing stink/vent pipe where the laundry is.

I can extend the 100mm diameter pipe to the new toilet and maintain a 1:40 fall in the pipe. My only "concern" is venting. (Perhaps there is something else I need to consider?)

Any help is very much appreciated. :)

I'm going to make a few assumtions about your drainage.

• the basin waste used to connect into the shower riser?
• The shower riser is the only floor drainage in your bathroom?
• The pan can not connect to the shower riser.

What you want to do is basically ok, but...

• The new basin pipe can not be more than 2.5 meters long, including the riser through the floor, under any circumstances
• The Floor in your bathroom needs to drain into the shower without obstruction

Now for the venting,...

• The pan may suck the water seal from the shower as the vent will not be in the ideal location after you are finished. If this happens I would be advising you to install another 50mm vent pipe between the pan and shower connections, taking it through to outside.

I'd probably install an IO junction into the line between the pan and shower incase it ever blocks up.