When exporting to EPANET, zero-length pipes and extra junctions are created at pumps and valves. EPANET treats pumps and valves as links and WaterCAD treats them as points, so this makes some sense as it will ensure the results are exactly identical. However, this it makes it difficult to use the exported file in EPANET because there are now two junctions with the same X/Y coordinates at the same location on top of the pump or valve. Maybe you can give the user a choice when exporting? Another option might be to give the EPANET link an equivalent diameter to the upstream and downstream pipes. Or just move the new junctions further away from the pump/valve.