Sewage Smell but no dry traps.

[emearg1]

I have a sewage smell coming from my toilet in my victorian terraced house.

The toilet is new and has been fitted by a builder.

All the traps are full in the bathroom.

I have refitted the toilet myself with a new 90 degree waste pipe and I am 100% certain that this pipe is airtight.

There is no smell from around the toilet, the smell is only in the toilet bowl.

I have bleached & scrubbed out the entire toilet, cistern & overflow.

The builder changed the toilet for another identical new toilet to see if the pan was faulty. We have the same problem with the new toilet.

The trap is the toilet is never dry or low.

I spoke to a plumber who reckons that I need to fit an AAV.

The house is a 1900's terrace and there is NO vent or AAV on the soil pipes at the moment that I can see.

Will the AAV solve the problem?
How is the smell getting in if the trap is always full of water?
When I had the waste open. the smell was appalling.
I know that soil pipes will smell foul, but should it be horrendous the second you take the waste off?
Is this smell somehow contaminating the water in the trap?

Please help,

Graeme.

 

[seco services]

soil pipes never smell that bad when toilets are removed.
as you say the smell shouldn't come past the water in the pan.

whats on top of the soil stack now ?
is it just open ?

should need an aav is the toilet worked ok before and flushes ok.

 

[emearg1]

There is NO soil stack now!

That is what I think is causing the problem.

So to be clear by toilet is just connected to a 110mm pipe with no stack, vent or AAV.

Is this causing a vaccum and pulling the smell back into the house?

 

[seco services]

what happened to the rest of the stack pipe ?

 

[emearg1]

There is not and never was one.

My gutters and kitchen waste run into a grid out side.

My bathroom is on the ground floor at the back of the house and the sink, bath and shower tray all run round to the same grid.

The soil pipe from the toilet is a 110mm hole in the fl0or of the bathroom that just runs into the sewerage but is sealed, no soil pipe, vent or valve.

That's not right is it?

 

[raymie]

Can I make a suggestion albeit from a non professional and sheer guess work basis.

With the absence of a soil stack and venting could it be that you have replaced a toilet with one that has a lower volume of water in the trap?

If that is the case would it not be possible that the pressure of gas in the pipe is enough to force past the lower volume of water?

DIY guess work so appolgies if this is total rubbish.

 

[mogget]

Regardless of the trap volume, you would see / hear bubbles if any gas was getting through the trap.