Question:
The inner gasket of my Aquatemp heater assembly is broken so I imagine
I will have to replace the whole unit. Is it essential that I replace
the existing unit with the exact same part or can I replace it with any
old one?
Answer:
I think any heater that fits on the same pipes and uses the same voltage
should work just fine. If you are replacing a heating element inside an
assembly, the shape would be important but not necessarily the brand.
If by upgrade you mean more watts (not better reliability/brand or a fancy
controller) then make sure the electrical circuit you have is sufficient for
the new current load.