Outdoor Smell coming from drain

Question

We have a square outdoor grid hopper with a kitchen sink draining into it. It smells in the summer and have had it inspected by a drain engineer with a camera. He has told us that there is nothing wrong with the drain however the smell venting back up is really bad. How can we solve this issue? Is it because it hasn't got a proper trap to stop the smell?

Andrew · Answer

Yes, put a swan neck on it with a water trap to stop spells coming back up

Joanne · Answer

Hi Oliver,

if your kitchen waste gully does not have a trap it cant hold any water to stop any smells from the sewer system.

sounds like you have a degree bend with a hopper sat on the top

thanks

Danny · Answer

You will need to put a trap on the grid hopper. Ideal you would replace the grid hopper with an access gully which have built in traps. This will then be easier to maintain.

Nicky · Answer

It has to be the trap, a new gully should sort this, it works the same way as your toilet, the water should stop the smell

Chris · Answer

It may be the drain has not got a proper gully that is not sealed

Lee · Answer

it needs a complete flush right out to the main sewer and possibly a u bend installing to stop back smells

Sean · Answer

If it’s not a swan neck hopper , yes you will get the smell , your inspector should of advised you on this

Luke · Answer

Hi

Yes, if there is no trap then this won’t help at all with the smells.

Kind regards

Luke

Frank · Answer

Hi Olivier 
It could be the trap for the sink causing the issue of the smell, have you checked the trap is clear? As the water seal within the trap is designed to stop this smell occurring

Outdoor Smell coming from drain

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