Sentence: The drain is clogged with hair. It has to be cleaned.
 Reason: The 'It' refers to the drain because The pronoun reference is faulty here because the pronoun it has two antecedents. ... Most likely, them refers to peanuts since it is highly unlikely that the writer of ... when the pronoun's antecedent functions as an adjective rather than a noun. 
 Question: Is the above reasoning correct or wrong? 