What is a potential result of a poorly fitted thru-hull?

A poorly fitted thru-hull can lead to water leakage into the hull due to the compromised seal between the thru-hull fitting and the hull itself. Thru-hulls are critical components on a boat that allow water to enter or exit the vessel for various systems, such as the engine cooling intake or discharge for bilge pumps. If the fitting is not properly installed or fitted, it can create gaps or spaces where water can seep through, posing a risk of flooding and damage to the interior structures of the boat.

Ensuring a proper fit and seal is essential for maintaining the integrity of a boat's hull and preventing unintended water intrusion, which can be detrimental to both safety and functionality. Furthermore, addressing such issues can be costly and time-consuming, making it crucial to focus on accurate installation during the construction or maintenance of a vessel. Other options presented do not address the significant safety concern that water leakage poses, thus highlighting the importance of a well-fitted thru-hull to avoid leaks.