the kitchen drain is blocked.
It has previously been draining slowly and fixed with unblocking store bought chemicals and/or plunger but now is not emptying at all.
Sink u-bend is clear.
Slow emptying has proven to be an issue previously particularly when dishwasher and washing machine run simultaneously.
I need someone to unblock the drainage system properly and ideally find the root cause of this issue.
Nb: the kitchen is upstairs in the flat and the bathroom downstairs. Downstairs does not appear to be showing the same issues.
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