A day after discharge urology nurse practitioner will ring the patient at home to check if the patient still wants to participate in this study. A day before their appointment for TWOC clinic urology nurse will ring the patient (in Group A, valve group) to remind him about the appointment and also remind him to close the valve 3-4 hours before appointment time and patients in both groups (Group A and Group B) to drink three glasses of water before coming to the hospital for catheter removal. Patients will be informed that they can withdraw from the study at any point.