120L Water Tank

The Pioneer 120L water tank has some useful features, but there are two major design flaws that limit its practicality.

Inlet size: The filler cap is only 43 mm wide, which makes it impossible to properly clean the inside of the tank. A larger 100 mm opening with a proper cap would be far better, as it would allow you to reach in with your arm and clean the tank thoroughly.
Outlet tap: The outlet tap is the same type used for toilet water supply lines. Unfortunately, this type of tap rusts quickly and becomes difficult to open or close. A more durable, corrosion‑resistant tap would make a big difference.
If these issues were resolved, I would rate the tank a solid 5 out of 5. However, in its current form, it only deserves a 3 out of 5.