We bought the house in 2019. A typical 22 × 75 terrace on the upper slope, three storeys, four bedrooms. Within twelve months we had counted six unplanned water disruptions — the upper-slope houses lose pressure first when supply drops.
By the time of the third disruption that lasted longer than 24 hours, we were buying bottled water by the case and rationing showers. The youngest, then 9, was the most stoic about it. The oldest, then 13, was vocal.
We were quietly tired of the storage tank brown-outs. Three years on, our laundry and toilets have not seen treated water once.
In late 2022 we contacted Green Master Harvest after a friend in Damansara Heights showed us his installation. The site assessment took an hour. They surveyed the roof — 162 m² usable catchment — and proposed a 4,500-litre wall-mounted system on the east elevation, where the first-flush diverter could be inspected from the kitchen window.
- Property type
- Terrace house (intermediate)
- System
- Voda Wall-Mounted (gravity-fed)
- Capacity
- 4,500 litres
- Catchment area
- 162 m²
- Installed
- January 2023
- Monthly bill saving
- RM 38–52 (avg RM 44)
- Payback period
- ~31 months
- Operating cost
- RM 0 (no pump)
What changed
The plumbing rerouted the toilet flush and laundry feeds to the harvested supply, with treated municipal water as automatic failover. The garden tap also runs from the tank. We did not touch the kitchen, bathroom basins or showers — those still run treated.
For three months we kept a notebook. The tank refilled twice in February and three times in March; it stayed half-full through the dry inter-monsoon. We have not run dry since the install. Even during the unplanned outages, the toilets and laundry kept working.
What we did not expect
The kids. The 13-year-old reads the tank level on the way to school. The 9-year-old has explained the system to two of his teachers. We did not install a system to teach them about water; that has been a side effect, and a welcome one.
Would we do it again?
Yes — same configuration, same installer, ideally with a 6,000L instead of 4,500L given how cheap the marginal capacity was. The wall-mounting kept the garden free, the gravity-fed design means we do not check on a pump, and the maintenance has been a quarterly diverter clean. Twelve minutes, no tools.