Do those hydraulics count as a pump? BTW, I used the pump and the Jamil whirlpool and it worked great; I'm going to add a pre-chiller for when the wort gets under 80F, just to see how fast I can get it down in the 50's. It only took about 35-40 minutes for 10 gallons of wort to go from boiling to 2 degrees above inlet temperature using 52F tap water. Call me a convert.