martin, the hose should be very flexible and elastic.
like those very flexible yellow or blue rubber hoses (i don't know how they are called in English) used when a nurse needs to give an IV injection.
The idea is to make the hose expand to the sides before the pressure switch detect the pressure.
like those very flexible yellow or blue rubber hoses (i don't know how they are called in English) used when a nurse needs to give an IV injection.
The idea is to make the hose expand to the sides before the pressure switch detect the pressure.