I flush/drain the tank once or twice a year when I'm down to my place > I do get some sediment . Yes you probably can replace rod but when you get a tank tank that's 5-7 years of age now your at the point of how much longer is it going to last especially if if it is used very much. At this your rolling the dice you could get a couple months more or 5 to 6 years out of it so you have to decide if it worth replacing the rod ( if you do it yourself you'll save money) or buy a new tank all together
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