There has been some discussion here about the position of the flow meter in Rossi's configuration. I have information from Rossi showing it was located in the gravity return between the customer site and the reservoir. I do not think there was a U pipe but I cannot rule that out 100%. Nothing like that is shown and no one who was there told me there is one -- and I did ask. Anyway, Abd pointed out that Penon described the configuration in one of the lawsuit documents. It is a little hard to understand Penon's English, so Abd added the comments in square brackets:
The cooling water is contained in a tank, placed inside the Plant, that receives the water from an external plant [sic, “tank”].
It is conveyed by pumps in [sic, “into”] the unit’s E-cat[s], where it is heated to vaporize. The steam is collected in one tube of the steam line, which conveys it to the outside of the shelter.
The steam is then passed through the customer’s facility, where it cools up to its condensation. *
The water is so recycled to the internal [sic, external] tank in a closed loop. The water is distilled water.
The external tank is connected with the internal tank, by a water line and a floating valve, so that the level of water inside the internal tank is maintained constant. The water flows from the external tank to the internal tank by gravity. […]
– flowmeter for measuring the flow rate of cooling water inlet into the shelter. It is located along the line of return of the water. between the Plant of the Customer and the 1 MW E-Cat.
* Note from Jed: "Cools up to its condensation" means it cools down until it condenses.
This contradicts assertions by Peter Gluck.