What does 400GPD means? Why the lifespan is 18-24 months?
Either 50GPD, 100GPD or 400GPD are RO membrane’s water flow specification, Some people mistakenly believe this is the daily capacity. In fact it is a common mark for distinguish. Here is how we calculate this specification: We make the 400GPD RO membranes filter water for 5-10 minutes. Measure and calculate the water volume: 0.278 gallon…