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View the thread, titled "New Bathroom - Intermittent Sewage Smell" which is posted in Bathroom Advice on UK Plumbers Forums.

L

Lionelbl

Hi all,

First post here so please be patient.

We recently had our ensuite remodelled and were initially really happy with the result. However, there is now sometimes a smell of raw sewage which I have tracked to the back-to-wall toilet (it could have been the shower or the sink).

It's not always present and I can't discover what triggers it (whether it's another toilet in the house being flushed or something).

Anyway, I removed the front panel of the toilet unit and apart from the rubble which was left in the cavity, I was surprised to see that the contractor had used a flexi pipe which actually runs uphill from the toilet to the waste. I'm no expert but from where I'm sitting that doesn't seem like a good idea. Could this be the source of the smell? I'll attach some pictures to the post. Unfortunately, these are not the best quality and it's difficult to see the extent of the difference in height.

Please give your honest opinions including how you would have solved the uphill waste issue (according to the specification, the toilet waste is 180mm from the floor, the main waste is higher but it's hard to say how much higher). Before I call the contractor back, I'd like some concrete facts to put in front of him.

Many thanks in advance!
 
The toilet waste needs to have a drop always like any other waste. Going to the soil pipe the waste pipe needs to be max 6meters long and have around 18mm drop each meter. This ensures that the water is not too slow or not rushing down the pipe taking over the solid team🙂
 

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New Bathroom - Intermittent Sewage Smell
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Bathroom Advice
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Lionelbl,
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