Although rainwater cannot normally be used for drinking water, it can be collected and used for watering the yard or, at a more sophisticated level, to supply household fittings and appliances such as toilets and washing machines.
The simplest way to harvest rainwater is to install a water barrel. Rain from the gutters runs through a downspout where a diverter channels water into the barrel.
When the fitting is completed, wait until it rains to test that everything is working correctly. Remember that the diverter unit should be disassembled from time to time to remove any debris from the filter. It is always best to try to prevent debris getting into the pipe in the first place by using leaf guard on your gutters.