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If I want to buy that solenoid valve, can you let me know what brand? and how to hook up electricity? thanks

what is solenoid valve? what function? thanks again

How much do I need to turn the lever to cut off 50% of water flow in 2" copper pipe? 1) exactly turn half between Full open and Full close position? or 2) 10% more towards close-side than half position? or 3) 10% less toward open-side than half position? as you know, the shape...

Partially closing a gate valve or ball valve increases the flow rate and momentarily the pressure ==> where? line (A) or (B)?

Let me ask again... 1) ball valve causes only "erosion" issue? how bad it is? and how long can the pipe hold the erosion before corrupt? and how many years can I use the pipe? and how will happens eventually, e.g. hole? or leaking? 2) IF TURN HALF(IOW, MIDDLE BETWEEN 'FULL OPEN' AND 'FULL...

1) how long can I use copper pipe before it destruct and erode make a hole or leak? ( if I use a ball-valve) 2) what kind of valve can I use to close 50%? Thanks,

Then, gate valve is OK?

Then how to use normal city water pressure when not busy time?

just erosion? if 45 degree close, is this mean 50% close, right?

From your diagram, what kind of storage tank? closed tank? thanks

what is "destructive turbulence"?

Like below drawing, city water flows in 2†copper pipe with 45psi, and then it splits into another 2†line ( (a) line ) and continue to run (b) line. There is 2†Ball Valve in the middle of (A) line. What happens if the ball valve in (A) line closed half(50%)? 1) (B) line gets any...

Like below drawing, city water flows in 2†copper pipe with 45psi, and then it splits into another 2†line ( (a) line ) and continue to run (b) line. There is 2†Ball Valve in the middle of (A) line. What happens if the ball valve in (A) line closed half(50%)? 1) (B) line gets any...