Lowest points in faulty drains (6)

I believe the answer is:

nadirs

'lowest points' is the definition.
(I've seen this before)

'faulty drains' is the wordplay.
'faulty' is an anagram indicator.
'drains' is an anagram of 'NADIRS'.

'in' is the link.

(Another definition for nadirs that I've seen is " Lowest points".)

I've seen this clue in The Guardian.

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