Outdoor Smell coming from drain

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?

Asked by Oliver on 30th Apr 2024
Expert Trade Answers
"Yes, put a swan neck on it with a water trap to stop spells coming back up"
Answered on 30th Apr 2024 - Member since Mar 2024 - report
"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."
Answered on 30th Apr 2024 - Member since Mar 2024 - report
"It may be the drain has not got a proper gully that is not sealed"
Answered on 1st May 2024 - Member since Jan 2017 - report
"If it’s not a swan neck hopper , yes you will get the smell , your inspector should of advised you on this"
Answered on 30th Apr 2024 - Member since Nov 2023 - report
"Hi

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

Kind regards

Luke"
Answered on 30th Apr 2024 - Member since Oct 2023 - report
"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"
Answered on 30th Apr 2024 - Member since Jun 2023 - report
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