I'm having a water flow problem with my RO system. Water flow was bad last Month so I changed the two filters and membrane which temporarily fixed the problem. The pressure in my tank is 10 psi empty and when I disconnect the tank from the system and open the valve water flows really well. I knows the spigot works because i took out the RO system and put in a 3 filter water purification system which the water runs fine. I just cannot figure out what the problem is. Any ideas?