I change it, because I am using the red tank. My mother will buy from at get store than bring home, and I do the change. Anyway I foresee only change twice a year. Last month was heavy, change 4 tank because my wife on confiment. I got the high power had stove like outside restaurant for boiling water. Do much faster than any convention stove.

Nowadays no home delivery anymore? I sometime see got lorry carry gas honking around.

Can't catch them. And I prefer Red tank, so far the physical outlook of red tank are better, and the valve is better. Yellow and Green sometime the physical outlook very bad, and many time the valve is leaking, got to use chopstick and readjust the valve.

Actually what are these colour code for?

Think color code from difference supplier. Yellow from Shell, Green from Petronas. Last time they put brand on the tank, now i don't see.

I see. I tot all bought from kedai runcit. Haha