A connector-with-integrated-check-valve for minimizing microbial migration tocatheter-tubing isformed from three parts: a connector-for-catheter-tubing that is hollow andwith an intemal valveseat； an elastomer gate (sometimes with disc and stem)； and a connectOr-for-extension-tubing that ishollow and with support-surfaces. When one end of the connector-for-catheter-tubing is attached toone end of the connector-for-extension-tubing, a pocket is formed where theseat is disposed oppositeand facing the support-surfaces； the gate is disposed within this pocket； suchthat when the gatecontacts this seat due to urine backflow (reflux), the connector-with-integrated-check-valve is closedto such urine backflow； and where a remaining end of the connector-for-catheter-tubing is attachableto catheter-tubing； and where a remaining end of the connector-for-extension-tubing is attachable tothe extension-tubing, such that there is a continuous urine flow path from thecatheter-tubing, to theconnector-with-integrated-check-valve when open, and to the extension-tubing.
