My Alkalenity has been really low and tried all summer to raise with no success. I'm hoping it's not rusted out from the inside.
The knocking sound almost seems like particles are running through the heat exhacher. Any ideas to help or do you think the Heat exchanger is done
Thanks,
Serge
The knocking you hear may just be air bubbles in the water. The heat exchanger should be fine as most of the Hayward heaters use a copper tube heat exchanger.
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