I recently posted about my TA being too low. ~60-70. The general consensus was that since my PH kept rising pretty regularly I should keep it where it is. I went on vacation for 10 days and used pucks in my inline dispenser.. when i got back I noticed by Masterpools Valve wasn't spinning properly (It has like 5 holes in it with a gear that spins around to move the output between my floor cleaner nozzles). I took it apart and noticed the metal pieces of it were disintegrating (Its only about 3 months old, just replaced it).
Checked my TA and it now pretty solidly at 50 (Although the PH was fine about 7.4). Did my low TA destroy my metal components in my valve? Checking other stainless screws and stuff in my pool they all look fine. Including a stainless washer I used in the valve because the one included was damaged. However all the little metal washers and posts in my gear system all have very noticeable pitting on them.
Would a TA of 50 cause this? I added some baking soda to get it up to about 70 but I am wondering if I should raise it a bit more. That gear setup for the valve costs about $125 to replace, if I have to buy another one I would like to avoid destroying it as well. :\ I'm going to contact the vendor to see if they have had other people report the issue, but I suspect my actions caused it. Its probably not as high of a quality as the other stainless components in my pool so perhaps more susceptible to the lower TA?