Plumbing wise the worry is GI pipe either become so clogged with rust and/or the tangki rusted (if its not a plastic tank)

Electrical wise at minimum change out the whole DB box components, check wiring continuity, and refresh sockets/switches as necessary (MK 13A sockets are not expensive), got extra money install Type2 SPD (surge protective device).. coz stuff from 30 years ago is all out of code liao.. dangerous.. last time hard to get high sensitivity protection, now it has become much more common and easy to get.



Changing out the DB box entirely, is not expensive for single phase even if you go full ABB parts.
Three phase will cost more lah.



Full read on water heater electrical safety here - https://www.st.gov.my/en/contents/publicati...r%20Systems.pdf

Lazy to read, watch video here -


This post has been edited by ceo684: Sep 24 2023, 11:44 PM