Bathroom Smells after rain

[Old Account]

as the title states it smells once it rained. However, the water seals in each trap or toilet is there nothing has sucked empty. Sewer gases apparently coming back but the customer can’t pin point where it is coming from.

Has anyone an idea?
I wanted to put those anti vac traps in to see whether it makes a different or not.

I’d appreciate if somebody could give me some advise.

Regards
Ron

 

[Old Account]

I forgot to add it’s a council property / flat. It’s a relatively big square with loads of apartments. I was thinking that it come from the communal / main soul stack

 

[Scott_D]

Failed durgo in the boxing ?
Traps full of scum & hair?

 

[Old Account]

Failed durgo in the boxing ?
Traps full of scum & hair?

Traps all cleared new traps anyway. Durgo might be an option will check that out thanks Scott

 

[Old Account]

All checked, the air vents are clean at the roof top. Anti vac traps fitted no hair , no blockages inside the traps.

 

[Old Account]

Two toilets connected but everywhere is a water seal without sucking anything empty. Just the brick wall is slightly open which could bring gases from the stack

 

[oz-plumber]

I stand to be corrected, but I thought you could only run double junctions vertically.
Flush 1 toilet and go look at the other and see what happens in the bowl.

You may want to spray the junction with soapy water and see if there is any any spillage when the toilets are flushed

 

[Old Account]

I haven’t installed it. I just got here and checked the same thing with gas leak spray if it bubbles up. I also checked the water seals in the toilets but all good no movements.

 

[Harvest Fields]

I haven’t installed it. I just got here and checked the same thing with gas leak spray if it bubbles up. I also checked the water seals in the toilets but all good no movements.

That old chestnut. It was like that when I got here...

 

[Old Account]

That old chestnut. It was like that when I got here...

Whatever