Leeva21 Posted September 29, 2014 Report Share Posted September 29, 2014 HI All, I recently replaced my hot tub's heat exchanger and 60 days later it is leaking. The pool guy said it was from the hot tub's alkalinity being too low therefore the part would not be under warranty. How long would the low alkalinity of the hot tub take to damage the heat exchanger? Thank You!! Quote Link to comment Share on other sites More sharing options...
Dr. Spa Posted September 30, 2014 Report Share Posted September 30, 2014 Depends on how low the alkalinity is, and what "heat exchanger" you have. Quote Link to comment Share on other sites More sharing options...
Leeva21 Posted September 30, 2014 Author Report Share Posted September 30, 2014 It's a Hayward H Series. The alkalinity tested 10 yesterday but previous tests showed it at 80. Wondering if the previous tests were false. Thanks!! Quote Link to comment Share on other sites More sharing options...
chem geek Posted September 30, 2014 Report Share Posted September 30, 2014 10 would generally be too low, most especially if the pH were to drop say by use of acidic source of disinfection such as Dichlor (or Trichlor, but that's not normally used in spas), non-chlorine shock (MPS) or bromine tabs. Quote Link to comment Share on other sites More sharing options...
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