A connector-with-integrated-check-valve for minimizing microbial migration to catheter-tubing is formed from three parts: a connector-for-catheter-tubing that is hollow and with an internal valve seat an elastomer disc shaped gate and a connector-for-extension-tubing that is hollow and with support-surfaces. When one end of the connector-for-catheter-tubing is attached to one end of the connector-for-extension-tubing, a pocket is formed where the seat is disposed opposite and facing the support-surfaces the gate is disposed within this pocket such that when the gate contacts this seat due to urine backflow (reflux), the connector-with-integrated-check-valve is closed to such urine backflow and where a remaining end of the connector-for-catheter-tubing is attachable to catheter-tubing and where a remaining end of the connector-for-extension-tubing is attachable to the extension-tubing, such that there is a continuous urine flow path from the catheter-tubing, to the connector-with-integrated-check-valve when open, and to the extension-tubing.
