Not true, its 7 years in the US and 6 years in Canada.
Also a Line of Credit is one of the most difficult lending products to qualify for. A secured Line of Credit and mortgage are easier because of the collateral of the house.
Dont confuse collections due to utility bills the same as collections due to credit card debit. Underwriters don't care for the $32 collection for Rogers Cable. They know that some utility companies send their clients to collections really quickly. I know the 407 sends you if your more than 30 days past due, tecnically thats a R2 on the bureau. A lot of utilities in collections are unwarrated.
The only thing that repairs credit is time. Every thing is calculated based on the date of activity. If you keep updating the bad debts by making payments your not helping the cause. I was a FICO score specialist trained by Equifax. I know what I'm talking about. Also, the original creditor usually will not buy back the debt as they take a 20% loss buy selling it, then will take a loss again if they buy it back, so to settle fpr a lower amount doesnt make sense.
I was just providing some general guidelines. A $32 collection with Rogers can be a royal pain depending on the scrutiny of the lender and the financial product. Not all are viewed the same way.