I like the idea of harvesting water in Johor Bahru, as it has lots of rainfall over the year and would be great for watering the garden plants, Plants like Orchids do well on rain water and dislike our tap water because of the chlorination.
Water flows down the rain pipes and is diverted into the tub, this is fitted with overflow (green pipe) and a tap lower lever to use the water stored.
I shall make mine from a plastic bin that would normally used for rubbish and adapt the lid to accept the flow of water from the roof popes and just fit an overflow pipe and bottom tap.
This one cost around rm250 my version will cost about rm50 max and my time to put together.
I will post here the diy project once I put it together for others to try.
Doing searches in Malaysia online I was pleased to find lots of rain harvesting programs in Malaysia.
Have you got one? Please do comment and let us know of your usage and what saving you make on the water bill.