You can install a small pure water water production equipment. The smallest on the market now is about 200 liters of water per day, which should be enough for drinking. And then install a water dispenser, processing out hot and cold water, it is a complete solution.
Total **** installation costs about 1500 yuan. In the future, according to the amount of water, water quality is good or bad, replace the filter cartridge, each time the cost of about 120. Annual maintenance costs have a 5, 6 hundred dollars on it.