Replaced mine last year and it was original. This house is 27-30 yrs old land my old one was a carrier and my new one is an American Standard. My next item to replace will be my Hot Water unit. It's 13 years old and I'm not sure if I should just replace it or wait until it stops working? My concern is it pops a leak from rust and floods the house....anyone have any experience with this? Advice on when to replace one in the name of preventative maintenance?



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