Human: How to create a water filtration system? Assistant: 
To create a water filtration system, you will need some basic supplies such as activated carbon, reverse osmosis filter cartridges, and a water pump. Start by connecting the water pump to your sink or faucet. Then, connect the activated carbon and the reverse osmosis filter cartridges in series. Finally, connect the outlet of the water pump to the tap or faucet. This should complete your water filtration system.