Buy water filter, the first important point is to understand the pure water production.
Few water filter general sales staff would tell customers clear to water production and meaning. Most simply say how much a gallon. In fact, pure water does not mean leading the production of water filter's flow. Because the flow is leading the stored water through the pressure tank, so there is the necessary flow out through the tap. So that the flow of the actual water filter's system is not pure water for water capacity. ROwater filter capacity refers to the actual manufacturing of the RO water filter’s membrane system for water (this film called 80GPD). To visually see the flow of pure water, that is, the pressure on the barrel of the switch is closed. Then turn on the tap, you can see the real water filter’s water flow. There is few customers shows the ability.
After buying water filter, customers would find not enough water in the water filter. So the first good water flow for your home water filter; that is very important.