Automatic fill system

A combination check valve and level sensor device, comprising:

• a valve housing having an inlet and an outlet;
• a piston chamber longitudinally disposed within the housing;
• a piston operably mounted in the piston chamber and coupled to a check valve, whereby a primary fluid passage is established about the check valve when a position of the piston is axially recessed within the piston chamber away from the valve housing outlet, the check valve comprising a tubular section having a tubular diameter, and a conical contact portion having a conical diameter that is larger than the tubular diameter;
• a spring within the check valve biasing the check valve to engage the outlet and close the primary fluid passage;
• a secondary passageway within the valve housing from the inlet to a level sensor outlet;
• a level sensor inlet formed in the valve housing opposite the level sensor outlet;
• a level sensor passageway fluidly connecting the level sensor inlet to the piston chamber;
• a radially disposed peripheral port in the valve housing upstream of the level sensor outlet and configured to draw in fluid and slow a flow of fluid exiting the level sensor outlet;
• whereby a fluid pressure in the level sensor passageway controls a position of the piston.