After 30 years, the water and gas pipes are giving way. The nastiest one is behind the bathtub. And finally, I removed the useless bathtub...
So, having said all these, how do you know that your gas or water pipe systems are having issues?
1. Water or gas bill is increasing every month although there is no change to usage pattern
2. Water pump is frequently switched on
3. Gas or water meters are moving even though there is no usage
How to spot where the leak is?
For gas, it is very difficult! Perhaps, during heavy rain, you may spot bubbling water. However, your nose could be your best gas detector.
For water, look out for wet spot or pool of water which suddenly appear.
For concealed pipes, look out for wet ceiling, wet concrete wall or localised wet soil.
To repair, perhaps it is better to get in profession and replace the whole system rather than follow what I have been doing. I found that copper piping do corrode over time. I will never use concealed piping system again. It looks good but the problem it is giving is simply not worth it!