[AndroidNeox (OP)]

What happens to a superfluid under unequal gas pressures?

Suppose unequal pressure were applied to the apertures of a “U” shaped pipe half full of superfluid. Would it do something weird or would it just act like a regular liquid?

[evan_au]

a “U” shaped pipe half full of superfluid

The concept of a "half full" U-shaped tube is a bit vague with superfluid helium.
A half-full tube rapidly empties itself, even with equal pressures. This is rather unlike a regular fluid.

[AndroidNeox (OP)]

Thank you. Sorry I wasn't very clear.

In the diagram, below, if pressure in side (A) is increased, will superfluid level in side (B) rise or will the gas pass through the superfluid? That is, does superfluid form a seal?  Suppose the gas is Helium and the superfluid is the same isotope of Helium.