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Marc, Plumber
Category: Plumbing
Satisfied Customers: 1127
Experience:  Plumbing heating & home maintenance contractor
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My husband fitted a new kitchen nov/ dec 15 - we have a

Customer Question

My husband fitted a new kitchen nov/ dec 15 - we have a floor drain that was covered up for 5 years with a plastic bag and on occasions there would be a smell and my husband would top up the water as we have underfloor heating - after fitting a dishwasher in Dec I have a constant foul smell that appears under the sink cupboard - this weekend he fitted a trap to the dishwasher outlet but the smell seems worse now !
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Customer: Regards Maggie
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Submitted: 1 year ago.
Category: Plumbing
Expert:  Rick replied 1 year ago.

Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. If my initial response doesn’t answer your question then let me know and we can continue our conversation.

There are basically only 2 ways a foul sewer odor can get into your kitchen. Either from a fixture drain that isn't trapped or the trap has dried out or from a broken drain vent or a trap that isn't vented properly. If a trap isn't vented then the trap can siphon out which allows the sewer odor into the house. A dishwasher pumps out water under pressure making the trap more likely to siphon out if it isn't vented properly.