You don't need no stinkin pumps!
Here is how my setup works:
One 15 gal ss pot with the high gravity element and a ball valve installed.
The element is plugged into the high gravity controller.
1 Fill pot with mash water, heat to strike temp.
2 Drain, via gravity, into a cooler mash-tun, mash / nap for an hour.
3 Drain, via gravity, into 5 gal buckets until cooler is empty.
4 Fill pot up with sparge water, heat it up.
5 Drain, via gravity, sparge water into cooler for batch sparge
6 Drain, via gravity, cooler into more 5 gal buckets
7 Empty your 5 gal buckets back into the empty pot, start boil
8 boil, boil, boil, don't forget the fermcap!
9 Drain, via gravity, from pot into plate chiller (Duda Diesel Rocks!)
then into a better bottle (6 gal)
10 Pitch yeast, don't forget the fermcap!
(The 15 gal pot, and the Coleman extreme cooler let me mash up to 35 lbs of grain!)
This is my chiller:
Best $60 you will spend!
Four weeks later you have great AG beer on tap!
This is a one pot, one cooler, simple setup.
The high gravity controller is acting just like the flame control on your propane burner.
I now laugh at the snow when I brew in the winter! Ha!