Hi Max, This is from the link I've posted above in this thread. Page 17. The aircraft would never have been certified otherwise.
A318/A319/A320/A321
The pumps located in the collector cell pick up fuel directly from the bottom of the pump canister.
FUEL L + R WING (INR) TK LO
A330/A340
The pumps located in the collector cell pick up fuel directly from the bottom of the pump canister. Jet pumps and clack valves ensure that the collector cells are maintained full.
NO RESTRICTION IN G LOAD
NO RESTRICTION IN PITCH