Domestic water heating

Hi. I have been here a few months now in Aregua. Before moving we had installed a Manchini water tank heater for domestic use. Now it has virtually stopped working. Someone who seems to know ab out these things hss said that this make needs cleaning out every 3 months. That is completely un acceptable and we are looking for altern atives. Can anyone please advise us. Thanks a bunch.

I have used Manchini water heater in several locations and have not had trouble with them.  Most have lasted at least 5 years.  I assume that whoever sold you this tank sold you a used one which had some issues.  You can also buy other brands (imported) at several locations in Asuncion like Tupi SA or Corporacion Mercantil. 

Good luck!!