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-   -   S to P trap convert (http://www.diychatroom.com/f7/s-p-trap-convert-149117/)

petros151 07-04-2012 06:36 AM

S to P trap convert
 
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in an old house where drains go thru floor is this conversion a good way to go ?

oh'mike 07-04-2012 06:47 AM

Both pictures are S traps--Add a T where the right hand 90 now sits--install an AAV to the top --then you will have a P-trap

Air Admittance Valves are not code in some areas--so check first.

petros151 07-04-2012 06:54 AM

1 Attachment(s)
Quote:

Originally Posted by oh'mike (Post 957522)
Both pictures are S traps--Add a T where the right hand 90 now sits--install an AAV to the top --then you will have a P-trap

Air Admittance Valves are not code in some areas--so check first.

so like this?

oh'mike 07-04-2012 07:03 AM

Good!! There you have it----

petros151 07-04-2012 07:11 AM

ok thanks, this looks simple to do!

wctekkk 07-04-2012 05:31 PM

to add to petros151 30" max

petros151 07-04-2012 05:37 PM

Quote:

Originally Posted by wctekkk (Post 957981)
to add to petros151 30" max

I might be going 20" from the TEE up to the AAV so I should be fine thanks!

rjniles 07-04-2012 07:02 PM

The AAV should be higher than the stand pipe.

petros151 07-04-2012 07:54 PM

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Quote:

Originally Posted by rjniles (Post 958042)
The AAV should be higher than the stand pipe.

sorry newbie here. Higher than what part of this diagram....

I am putting this under the sink in a sink base cab. I cannot put things in the walls. So the sink base is up against the wall and the highest I can go with an AAV is at the top of the cab. so that would make it a bit higher than the level at which the sink connects to the drain. I have an illustration to show what I would do (have not done it yet but HOPE to do this TOMORROW) THANKS !!!

rjniles 07-04-2012 08:24 PM

Your earlier posts showed a laundry standpipe not a sink. The AAV is supposed to be above the flood rim of the sink.

wctekkk 07-04-2012 08:25 PM

2"drain would be nice

rjniles 07-04-2012 08:30 PM

Quote:

Originally Posted by wctekkk (Post 958090)
2"drain would be nice

For a laundry standpipe- yes. For a sink 1.5" is fine.

petros151 07-04-2012 09:20 PM

1 Attachment(s)
Quote:

Originally Posted by rjniles (Post 958088)
Your earlier posts showed a laundry standpipe not a sink. The AAV is supposed to be above the flood rim of the sink.

yes my error I started just asking about P traps and S traps in general. But in fact this is a kitchen sink set up with a D/W I'm attempting. I can quickly see I am in trouble here.

as to the AAV In my case the base cab is up against the wall and as of now there is no where to put the AAV except at the top of the cab which is below the flood rim.

so in this case is it worthless to try an AAV at all? and this another issue-- I am going to have a Dish washer drain into the same drain as the sink. here is another drawing... gulp:(

wkearney99 07-04-2012 09:48 PM

When the AAV is lower than the flood rim of the sink then water will overflow through it first, leading to a leak you won't seek at the sink first.

wctekkk 07-04-2012 09:51 PM

thought he was dumping his a/w into sink. my bad


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