Drain smell from newly fitted sink

[doog442]

Just before we had a new kitchen fitted (and on ripping out the old one ) I fitted the old kitchen sink in the integral garage. It was a temporary thing but I've decided to keep it as its handy for washing decorating brushes and also when I'm working on the car etc.

I plumbed the old sink waste pipe into an existing waste pipe that led from the utility sink, into and along the garage wall (where I teed into it) then outside to a soil stack that serves an upstairs ensuite loo, shower and sink. Apart from cleaning the old fittings /pipes every was fitted as before. The waste pipe runs at a gentle angle from the utility through the garage wall along and outside into the soil stack.

The issue is I get a drain smell from the sink in the garage. It's not a massive problem due to location and I just stick the plugs in. The sink in the utility is fine - no smell from that. I'm just wondering if this a problem relating to my 'design' - I literally teed into an existing waste pipe or indicative of a problem / blockage with the soil stack.

Cheers

 

[just pumps]

Do you have a water trap on the smelly sink.

 

[Rodders53]

Show some pictures - it will surely aid diagnosis.

 

[Madrab]

As suggested, the only thing in a waste pipe run, that stops sewer smells tracking back up through a waste pipe run is the trap connected to the wink waste, the trap has a water seal in it the stops those gases from entering the room. Either you don't have one or the one you have isn't retaining it's seal (syphoning/self syphoning/backpressure/capillary/etc)

 

[doog442]

Do you have a water trap on the smelly sink.

Yes

Show some pictures - it will surely aid diagnosis.

Will do

As suggested, the only thing in a waste pipe run, that stops sewer smells tracking back up through a waste pipe run is the trap connected to the wink waste, the trap has a water seal in it the stops those gases from entering the room. Either you don't have one or the one you have isn't retaining it's seal (syphoning/self syphoning/backpressure/capillary/etc)

see pics

 

[doog442]

Under sink plumbing - the smell comes out of either sink. This was how the original was plumbed in so just replicated it using old fittings and a bit of new .

This is where I teed it into the waste pipe to the soil stack

 

[HERTS P&D]

You have a Tee going the wrong way.

Andy

 

[doog442]

You have a Tee going the wrong way.

Andy

Oh yes, the one going up. Would that cause the smells or something weird to happen. Would the traps not still work ?

 

[Madrab]

Is the appliance spigot sealed?

OK - the only thing that is can be then is back pressure from the other outlets or there's syphoning occurring - nothing else could cause it, unless the traps/waste were gunged up of course.

 

[doog442]

Is the appliance spigot sealed?

OK - the only thing that is can be then is back pressure from the other outlets or there's syphoning occurring - nothing else could cause it, unless the traps/waste were gunged up of course.

Hi..traps are clear . This is the plumbing under the utility sink- ie washing machine waste- spigot? (is that what you mean- apologies if not). Waste pipe through wall and I connected about 3 foot the other side of wall.

 

[Madrab]

I meant this one



Not that it matters really - as suggested the only thing that will allow sewer smells back up into the sink is if the water seal in the trap(s) is compromised. Everything in the pics looks fine, even tho the swept T is round the wrong way, could that cause back pressure in the other trap - possibly.