Dear Customer - Thank you for contacting us. The crimp in the hose is likely a result of excessive use of boiling water or the pouring of hot oil into the drain. Such actions can cause damage to all types of PVC or plastic drains. Several factors could contribute to an increased probability of this type of failure when combined with boiling water or oil, including: Slow draining installation, horizontal installation, U-Form i nstallation. To prevent such issues, it is advisable to avoid excessive use of boiling water or hot oil, ensure a steady drainage flow, consider the orientation of the hose during installation (preferably avoiding horizontal setups), and choose installation configurations that minimize the risk of crimping, such as avoiding U-shaped configurations. Should you have any questions or comments, please feel free to contact us at support@snappytrap.com