That is not for filtering water it's called a MFV multi functional valve basically what it does is if the water pressure Is too high it will automatically drain the water from the tank And I think you should attached that too because it is for safety purpose
A vry vry confused non sense explanation The company selected a English spoken not capable nallowed a untrained unfit person Hot cold supply nt experience
Dear sir, This guy was a third party hired technician who installed the product. On the other hand I am a very unknown and new person about this product. Hope you understand .
