Daughter bought a older home that had the kitchen remodeled.
The kitchen sink does not have a direct vent to the roof but uses one of the
pressure valves type devices.
The device is under the kitchen sink in a corner of the cabinet against the
very back wall.
Now here's the strange part.
There is what appears to be a yellow plastic sticking out of the pipe.

It's like they put a plastic bag over the pipe and then shoved the vent
device over the plastic.

Unfortunately there is no way to run a real pipe vent up through the walls
and out the roof.
I could drill a hole through the 12" brick wall to the outside but that's a
street/sidewalk side wall and would look terrible.

So before I take this apart...anybody have an idea what the problem is.
(I do understand the principal of venting and the vacuum created by water
running down the drain)

Also, a possible contributing factor.
The sink drain has the LONGEST tail piece I've ever seen. It makes the P
trap assembly extremely deep reaching almost to the bottom of the sink
cabinet before it goes back up and then horizontal into the drain. It's got
to hold more water than any P trap I've seen in a residential installation.

Please help, the smell is bad and you waste a lot of water running in the
sink to remove the smell.
Although the smell could be coming from the laundry sinks in the basement
directly below.

--


-----------------------------------------------------
The quartermaster has only two sizes, too large and too small.
-----------------------------------------------------

Bill H. in Chicagoland
webcams at http://24.14.49.4:8080
weather at http://mywebpages.comcast.net/w9ol/WX/HH.htm

FireBrick wrote:
Daughter bought a older home that had the kitchen remodeled.
The kitchen sink does not have a direct vent to the roof but uses one of the
pressure valves type devices.
The device is under the kitchen sink in a corner of the cabinet against the
very back wall.
Now here's the strange part.
There is what appears to be a yellow plastic sticking out of the pipe.

It's like they put a plastic bag over the pipe and then shoved the vent
device over the plastic.

Unfortunately there is no way to run a real pipe vent up through the walls
and out the roof.
I could drill a hole through the 12" brick wall to the outside but that's a
street/sidewalk side wall and would look terrible.

So before I take this apart...anybody have an idea what the problem is.
(I do understand the principal of venting and the vacuum created by water
running down the drain)

Also, a possible contributing factor.
The sink drain has the LONGEST tail piece I've ever seen. It makes the P
trap assembly extremely deep reaching almost to the bottom of the sink
cabinet before it goes back up and then horizontal into the drain. It's got
to hold more water than any P trap I've seen in a residential installation.

Please help, the smell is bad and you waste a lot of water running in the
sink to remove the smell.
Although the smell could be coming from the laundry sinks in the basement
directly below.


They may have made the trap deep in order to try and solve the problem
of self-siphoning (guess).

I'm guessing the pipe where the vent device is connected is iron.
Re-do the connection to the device using a No-Hub (Fernco) coupling
to avoid whatever the yellow thing is and prevent leaks there.

When the sink drains a large volume, you should be able to hear
the vent device suck in air and/or chatter.

Shine a bright light down the sink drain and see if there
is water in the trap. If there *is*, then the trap is not
allowing sewer gas up.

It *could* be that the long tailpiece is full of gunk (tech term)
which is moldy and emitting the odor. Could try bleach to kill
it but probably have to take tailpiece out.

Jim

"Speedy Jim" wrote in message
et...
FireBrick wrote:
Daughter bought a older home that had the kitchen remodeled.
The kitchen sink does not have a direct vent to the roof but uses one of
the pressure valves type devices.
The device is under the kitchen sink in a corner of the cabinet against
the very back wall.
Now here's the strange part.
There is what appears to be a yellow plastic sticking out of the pipe.

It's like they put a plastic bag over the pipe and then shoved the vent
device over the plastic.

Unfortunately there is no way to run a real pipe vent up through the
walls and out the roof.
I could drill a hole through the 12" brick wall to the outside but that's
a street/sidewalk side wall and would look terrible.

So before I take this apart...anybody have an idea what the problem is.
(I do understand the principal of venting and the vacuum created by water
running down the drain)

Also, a possible contributing factor.
The sink drain has the LONGEST tail piece I've ever seen. It makes the P
trap assembly extremely deep reaching almost to the bottom of the sink
cabinet before it goes back up and then horizontal into the drain. It's
got to hold more water than any P trap I've seen in a residential
installation.

Please help, the smell is bad and you waste a lot of water running in the
sink to remove the smell.
Although the smell could be coming from the laundry sinks in the basement
directly below.


They may have made the trap deep in order to try and solve the problem
of self-siphoning (guess).

I'm guessing the pipe where the vent device is connected is iron.
Re-do the connection to the device using a No-Hub (Fernco) coupling
to avoid whatever the yellow thing is and prevent leaks there.

When the sink drains a large volume, you should be able to hear
the vent device suck in air and/or chatter.

Shine a bright light down the sink drain and see if there
is water in the trap. If there *is*, then the trap is not
allowing sewer gas up.

It *could* be that the long tailpiece is full of gunk (tech term)
which is moldy and emitting the odor. Could try bleach to kill
it but probably have to take tailpiece out.

Jim

Thanks Jim...I'll check that tailpiece and P trap.
But the drain is 2" PVC which goes down and obviously connects to some iron
somewhere inside the finished ceiling....

While we can't find any evidence of water leakage...wonder if the transition
from PVC to Cast seal is good...

Oh and BTW: Here in Chicagoland the tech term for that stuff that builds up
inside drains is 'smegula'. wink

"FireBrick" wrote in message
. ..
Daughter bought a older home that had the kitchen remodeled.
The kitchen sink does not have a direct vent to the roof but uses one of
the pressure valves type devices.
The device is under the kitchen sink in a corner of the cabinet against
the very back wall.
Now here's the strange part.
There is what appears to be a yellow plastic sticking out of the pipe.

It's like they put a plastic bag over the pipe and then shoved the vent
device over the plastic.

Unfortunately there is no way to run a real pipe vent up through the walls
and out the roof.
I could drill a hole through the 12" brick wall to the outside but that's
a street/sidewalk side wall and would look terrible.

So before I take this apart...anybody have an idea what the problem is.
(I do understand the principal of venting and the vacuum created by water
running down the drain)

Also, a possible contributing factor.
The sink drain has the LONGEST tail piece I've ever seen. It makes the P
trap assembly extremely deep reaching almost to the bottom of the sink
cabinet before it goes back up and then horizontal into the drain. It's
got to hold more water than any P trap I've seen in a residential
installation.

Please help, the smell is bad and you waste a lot of water running in the
sink to remove the smell.
Although the smell could be coming from the laundry sinks in the basement
directly below.

--


-----------------------------------------------------
The quartermaster has only two sizes, too large and too small.
-----------------------------------------------------

Bill H. in Chicagoland
webcams at http://24.14.49.4:8080
weather at http://mywebpages.comcast.net/w9ol/WX/HH.htm


Check for dry traps in basement, especially floor drains.

Don Young