Copper pipe corrosion

[beebinator]

Does anyone know what caused my tankless hot water heater condensation and pressure relief copper pipe to rot away.

 

[Mliu]

Difficult to tell with so little information and no close-up photos. But it looks like the copper may be melted. If so, then I'd suspect an electrical cause.

 

[Sponsor]

 

[Reach4]

The condensate would be acid. The condensate is often neutralized before being piped away.

I don't know why temperature and pressure relief water would eat up a pipe.

What is that WH brand? Havich, or what?

 

[hj]

The condensate needs to be neutralized before you drain it into copper tubing, or else run the condensate, but not the relief valve piping, in PVC.