Sink plumbing question
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txvwnut
Well-known member
Re: Sinknolumbing question
I’d say relocate the washer drain connection to after the trap. I’m no expert but most of the washer drain setups I’ve don’t have a trap in them.
I’d say relocate the washer drain connection to after the trap. I’m no expert but most of the washer drain setups I’ve don’t have a trap in them.
Re: Sinknolumbing question
*I'm not a plumber*
I have never seen a hard piped dishwasher drain. I have ever only seen the smaller, flexible hoses, about an inch and a half or so. Those hoses are run as high as possible within the cabinet and looped down onto the drain to create an air gap. Maybe replacing the PVC pipe and adding a flexible one will fix your issue.
Another thing you can try to do is add an Air Admittance Valve (AAV) to the drain line to facilitate with the pressures within the pipes.
*I'm not a plumber*
I have never seen a hard piped dishwasher drain. I have ever only seen the smaller, flexible hoses, about an inch and a half or so. Those hoses are run as high as possible within the cabinet and looped down onto the drain to create an air gap. Maybe replacing the PVC pipe and adding a flexible one will fix your issue.
Another thing you can try to do is add an Air Admittance Valve (AAV) to the drain line to facilitate with the pressures within the pipes.
510ebl
Well-known member
Re: Sinknolumbing question
Unless I misunderstand, this is from a clothes washing machine next to a lavatory sink. Nothing kitchen in the image.
And it isn’t vented properly, IMO.
Unless I misunderstand, this is from a clothes washing machine next to a lavatory sink. Nothing kitchen in the image.
And it isn’t vented properly, IMO.
Shiftless
Well-known member
Re: Sinknolumbing question
Yes this is from a clothes washer
Previously where the clothes washer line ran into the pvc there was a y. One side had drain line and the other end was open.
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Yes this is from a clothes washer
Previously where the clothes washer line ran into the pvc there was a y. One side had drain line and the other end was open.
Sent from my SM-G930R4 using Tapatalk
Kaizen
Well-known member
Re: Sinknolumbing question
Agree no vent plus the forced rush of the washer is blowing any water out of the sink trap. Is there a trap where the washer hose is before this? Not sure if those under island air inlet things will work due to amount and pressure from washer
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Agree no vent plus the forced rush of the washer is blowing any water out of the sink trap. Is there a trap where the washer hose is before this? Not sure if those under island air inlet things will work due to amount and pressure from washer
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Re: Sinknolumbing question
I'm assuming the washer is coming in from the left side of your picture?
I am guessing the overflow in your lav sink needs a good clean . when the washer discharges it puts a bit of pressure in the drain and causes a "backflow" of the old soap scum smell etc that has built up
I'm assuming the washer is coming in from the left side of your picture?
I am guessing the overflow in your lav sink needs a good clean . when the washer discharges it puts a bit of pressure in the drain and causes a "backflow" of the old soap scum smell etc that has built up
paredown
Well-known member
Re: Sinknolumbing question
For the final word, I'd post your pic on Terry Love's forum, but I would think that the sink trap should be for the sink only, and that washer should also have a trap of it's own, and hit lower down. Plus I see no evidence of a vent for either.
My guess is the rush of water from the washer is hitting hard enough that it creates suction--then ***** the water from the trap on the sink--hence the stink...
You could fix the vent for the sink by adding a dry vent/ "mechanical air admittance device" like is used with island sinks as someone has mentioned... which would be easier than trying to vent to outside from what I can see. The washer though still might create more suction that one of those could handle, and not eliminate the odor.
Washers generally discharge into a standpipe with a wet trap at the bottom--and from there the discharge goes into the stack/main waste. You have large amounts of water discharging, and the stand pipe allows the rush of water to drain quickly--and also "vent" by drawing in air vertically as the rush hits--so maybe both sink and washer would need venting in your case.
You might get away with sizing down the p-trap on the sink, and squeezing in a separate trap for it--with a mechanical vent in place--but I think the washer discharge would still want to suction that water out of it when the washer discharges
It would be worth it to run it past the guys on Terry's forum for the best fix...
For the final word, I'd post your pic on Terry Love's forum, but I would think that the sink trap should be for the sink only, and that washer should also have a trap of it's own, and hit lower down. Plus I see no evidence of a vent for either.
My guess is the rush of water from the washer is hitting hard enough that it creates suction--then ***** the water from the trap on the sink--hence the stink...
You could fix the vent for the sink by adding a dry vent/ "mechanical air admittance device" like is used with island sinks as someone has mentioned... which would be easier than trying to vent to outside from what I can see. The washer though still might create more suction that one of those could handle, and not eliminate the odor.
Washers generally discharge into a standpipe with a wet trap at the bottom--and from there the discharge goes into the stack/main waste. You have large amounts of water discharging, and the stand pipe allows the rush of water to drain quickly--and also "vent" by drawing in air vertically as the rush hits--so maybe both sink and washer would need venting in your case.
You might get away with sizing down the p-trap on the sink, and squeezing in a separate trap for it--with a mechanical vent in place--but I think the washer discharge would still want to suction that water out of it when the washer discharges
It would be worth it to run it past the guys on Terry's forum for the best fix...
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dutchgray
Well-known member
Re: Sinknolumbing question
In the UK that would be fine provided the washer connection was sealed otherwise it would need its own trap and the whole thing would need to drain into a vented stack or externally with an air gap into the drain.
In the UK that would be fine provided the washer connection was sealed otherwise it would need its own trap and the whole thing would need to drain into a vented stack or externally with an air gap into the drain.
rslaback
Well-known member
Re: Sinknolumbing question
You can't see it in these images but I would bet 5 bucks that where the pipe exits the cabinet on the right side and goes into the wall, the vent stack goes up inside the wall. I don't think venting is your problem. The design of the plumbing seems ok to me. Have you checked the drain system in the washing machine? Most of them now have a filter in them that gets absolutely disgusting and the waste water gets that same nasty smell as it goes through the system. With that trap where it is, there shouldn't be any way that you get actual sewer gas.
You can't see it in these images but I would bet 5 bucks that where the pipe exits the cabinet on the right side and goes into the wall, the vent stack goes up inside the wall. I don't think venting is your problem. The design of the plumbing seems ok to me. Have you checked the drain system in the washing machine? Most of them now have a filter in them that gets absolutely disgusting and the waste water gets that same nasty smell as it goes through the system. With that trap where it is, there shouldn't be any way that you get actual sewer gas.
Re: Sinknolumbing question
How is the washer tied into the drain line ?
How is the washer tied into the drain line ?
rslaback
Well-known member
CombatNinja
Well-known member
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Re: Sinknolumbing question
There is no way in hell that is to code anywhere in America.
But whatever. I just clicked on this thread to see what a "sinkolumbing" was. Thought it was something from IKEA.
There is no way in hell that is to code anywhere in America.
But whatever. I just clicked on this thread to see what a "sinkolumbing" was. Thought it was something from IKEA.
firebirdparts
Well-known member
Re: Sinknolumbing question
Vent is the real issue with stopping the smell. The washer is just too good at getting a siphon going.
Vent is the real issue with stopping the smell. The washer is just too good at getting a siphon going.
Did a plumber do that ?
My washers have 2" drains -- unless that was built for the washer ... what's in the wall? If it's a sink setup -- it will drop down to 1.5"
Also -- have never seen a common trap on a washer.
Typically the washer will have 2" pipe to the main and they have a dedicated trap.
My washers have 2" drains -- unless that was built for the washer ... what's in the wall? If it's a sink setup -- it will drop down to 1.5"
Also -- have never seen a common trap on a washer.
Typically the washer will have 2" pipe to the main and they have a dedicated trap.
csp
Well-known member
I'm confused. Is the latest post photo yours or is it the one in the first post? They are quite different and the latest one doesn't even have a trap.
Eric S.
Active member
Can you verify if the washing machine is causing the P- trap to siphon out? Could just be stinky washing machine water you are smelling. If it is not siphoning out then I would just split the sink and washing machine lines and have a trap for each....FYI I am not a plumber.
Although guess is it was the washers water smelling it would still come up the standpipe for it. lol Maybe just need to clean the machine.
Although guess is it was the washers water smelling it would still come up the standpipe for it. lol Maybe just need to clean the machine.
Kaizen
Well-known member
Oy. Lots of bad. That stack is just in the middle of a room?
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nmk_61802
Well-known member
Since your sink does not have it's own trap, it is effectively acting as the vent for the washing machine (why it smells when you wash). It has no choice since it is the first vent in the string.
I would move your current trap toward the washing machine, behind the sink tie in, and allow it to be the primary path to drain, keeping it at the same elevation. I would then put a deep trap on the sink line and wye it into the washer drain.
This allows each fixture to have it's own trap, as shared traps are not generally allowed either.
You may still have an issue with the shared stack/ vent and the sink trap being sucked dry due to the overall distance from the washing machine, however the above is a good start.
I would move your current trap toward the washing machine, behind the sink tie in, and allow it to be the primary path to drain, keeping it at the same elevation. I would then put a deep trap on the sink line and wye it into the washer drain.
This allows each fixture to have it's own trap, as shared traps are not generally allowed either.
You may still have an issue with the shared stack/ vent and the sink trap being sucked dry due to the overall distance from the washing machine, however the above is a good start.
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