HI Bro KenYee.
Those bend pipes and joints which not shown in the pictures actually can be accessible from another compartment which didnt show in the pictures.
Furthermore those joints are fully glue which is not mean for any changes.
Removing the top part will allow it to be transfer when needed.
Thanks for your suggestion.
I'm not using any top up tank as i'm doing water change weekly.
For those who knows me, will see me often weekly at pasir ris lfs as now DI units not DIY yet.
Hehe...