Downstairs Bathroom - Sewage smell

[Redsman13]

Hello,

We have had a bad sewage smell coming from the downstairs toilet for the last few years. We had a new suite put in back in 2019 which didn't resolve the issue. The smell seems to be coming from the sink side of the room. I have removed the sink unit now and can see that the waste pipe just seems to fit in a hole in the ground. The pipe in the ground also seems to be damaged. Is this likely to be the cause of the issue (potential stagnant water not draining properly into the main drain)?

Thanks in advance

 

[Deleted member 120897]

It won’t be stagnant water, it’ll be sewer gasses emanating from the gap around the pipe. It’s a bit rough. You’d probably need to expose the drain a little more to ascertain how to connect it up, or do the job properly.

 

[Redsman13]

It won’t be stagnant water, it’ll be sewer gasses emanating from the gap around the pipe. It’s a bit rough. You’d probably need to expose the drain a little more to ascertain how to connect it up, or do the job properly.

Thanks buddy, it was done by a plumber originally (clearly not a very good one).

 

[Redsman13]

Morning all, following on from my post back in 2021, we had the damaged pipe repaired in our downstairs WC. Unfortunately 3 years on and there is still an intermittent sewage smell, I believe it to be coming from the sink. It is generally worse in the wet winter months and can be mitigated by pouring a kettle full of boiling water down the sink and lighting candles. The sink is not used daily.

We have had a gas check done to ensure there are no gas leaks. If I open up the manhole in our back garden you can also see the water from the tap or toilet running free down to the main drain.

Can anyone provide any advice on this issue or guide on the next troubleshooting steps as we are keen to get to the bottom of this issue? Thanks in advance.

 

[Rtplumb]

Morning all, following on from my post back in 2021, we had the damaged pipe repaired in our downstairs WC. Unfortunately 3 years on and there is still an intermittent sewage smell, I believe it to be coming from the sink. It is generally worse in the wet winter months and can be mitigated by pouring a kettle full of boiling water down the sink and lighting candles. The sink is not used daily.

We have had a gas check done to ensure there are no gas leaks. If I open up the manhole in our back garden you can also see the water from the tap or toilet running free down to the main drain.

Can anyone provide any advice on this issue or guide on the next troubleshooting steps as we are keen to get to the bottom of this issue? Thanks in advance.

Hi, could you get a picture of the trap connected to the downstairs basin (is it a pedestal one?) Now, if it’s an inline trap it might be stuck in the open position and letting the odours through. If it is an inline trap swap it for a basin pedestal trap.

 

[DAVE01]

Morning all, following on from my post back in 2021, we had the damaged pipe repaired in our downstairs WC. Unfortunately 3 years on and there is still an intermittent sewage smell, I believe it to be coming from the sink. It is generally worse in the wet winter months and can be mitigated by pouring a kettle full of boiling water down the sink and lighting candles. The sink is not used daily.

We have had a gas check done to ensure there are no gas leaks. If I open up the manhole in our back garden you can also see the water from the tap or toilet running free down to the main drain.

Can anyone provide any advice on this issue or guide on the next troubleshooting steps as we are keen to get to the bottom of this issue? Thanks in advance.

Just looking at your Photo The conection is not a patent joint You should use a Rubber Conection were it joins the red earthin ware Pipe to the PVC bend or another solution is to use what is Called a 6x4 tipple in Pvc Put the 6inch part over the earthinware pipe you have to calk the timple with a good mixture of sand and cement and robe let this set then attach your black bend and the 90 Degree bend . As regards the sink its never a good idea to tap into a sewer more so on a Down stairs Toilet when you fluch the WC it can pull the seal on the Sink Trap . This is how you end up getting a oder in the bathroom . Your best Bet is to chase the Floor Run 11/2 Pipe from the Kitchen Sink with a fall this has to go into a Armstrong Junction and on the Armstrong Junction there is a Connection for a Gully this has a master Trap and your 1x1/2 pipe goes into this gully for the waste water from the sink or kitchen sink . You Might be Lucky and have a Gully out side it will be a bit of work if you do this yoursel but you will have no Problems down the Road . Just looking at this as i say i would say the downstairs WC is pulling the seal out of the Sink trap Depending were you have the sink tappet into the sewer Most Sewers to day are a two pipe System One Sewer for Rain Water and one sewer for Fowl water This changes somewhat on modern day houses were buy the waste water is tapped in a sewer out side but with one big differance the soil pipe is vented abouve the roof and abouve all upstairs Windows Hope this is of some Help

 

[Redsman13]

@Rtplumb I have attached a few photos to the post. One of the downstairs sink trap and one which just about shows the black waste feed from the trap into the rubber outlet. Thanks.

 

[Rtplumb]

@Rtplumb I have attached a few photos to the post. One of the downstairs sink trap and one which just about shows the black waste feed from the trap into the rubber outlet. Thanks.

Ah, ok that’s a bottle trap. It looks like it’s weeping a bit from the grate end. Is the waste pipe into the rubber plug a tight fit?