Moen 8285 M-Dura Commercial Kitchen Faucet - Chrome

For the most part we were happy with this faucet (a Moen Dura 8285 - used in a light commercial/restaurant application in a secondary sink) until it started constantly dripping. After approximately 5 to 6 years of use we have now noticed corrosion in the hot water side which no amount of calcium/lime remover or new replacement cartridges would correct (which we've been frustratingly working on for the past 2 years). Considering all the other faucets in the kitchen/building are working no problem and the main faucet in our dishwashing area is working fine (for more than 15 years) we suspect this is a manufacturing defect. I have been mostly happy with other Moen commercial faucets we have purchased for our business. I would have expected at least 10 to 15 years (minimum) from a faucet that is branded as "commercial". The overall cost of parts and labour on this single faucet (including now a requirement to replace the entire faucet) is, in a word, shameful.