It does have a pressure hose, inside the machine connected between the pressure switch and a small chamber on the outer drum. If the water continues to fill when the power is switched off then the valve and nothing else is at fault. If it continues to fill when switched on then a problem with the pressure switch, pressure hose or the pressure chamber is the likely culprit. It can be due to a small hole worn in the rubber pressure hose, a blockage in the pressure chamber or hose or a faulty pressure switch.