Pump work between amount of fill

[Chico008]

Hi
First, sorry for my poor english.

Then
I'm trying something i can't manage to do.

I'm stocking Gaz in a tank.
i have a pump for output the gas.
I'd like the pump to work for some conditions, like a switch beeing put on and off, but i don't know how to do.

In fact
the tank fill, i want the pump to work when the tank is over 2000 until reach 0
when the tank is depleted, i want the pump to stop, and only work again when the tank is over 2000 again.
so the pump work eficiency for some time, and dont turn when the tank is only 3 or 6 gaz.

i know i'll have to use combinator, but their usage is not easy at all, not user friendly
Any idea how to do this ?

[DaveMcW]

You only need combinators to rename one signal, the rest can be done with pumps.

[Chico008]

I really need to do all of this ?

I only wanted a small pump on the output

Even seeing your pic, i don't understand the logical in signal and operations