Where to Buy Reverse osmosis Domestic Water Purifier in Kenya. Reverse osmosis domestic water purifiers are a good alternative the commercial ones however you might be wondering where to buy reverse osmosis water purifier in Kenya. We would like to help you get the right one for your needs and in this post we will be sharing some insights. Access to clean and safe to drink water is a big challenge in many parts of the country including urban centers and major towns. To overcome this challenge, we bring you reverse osmosis domestic water purifiers that you can install in your home and enjoy clean and safe water to drink.