In a scenario where wet well levels rise rapidly with increased flow from rain, what would be a likely issue?

The scenario describes a situation where wet well levels rise quickly due to increased flow from rain, which typically indicates that excess water is entering the system at a rate that the pumps may not be able to handle efficiently. In this context, the most likely issue is that the check valve in the follow pump is clogged.

A check valve is designed to allow flow in one direction and prevent backflow. If the check valve in the follow pump gets clogged, it may restrict or completely block the pump's ability to discharge water effectively. This blockage would hinder the system's ability to keep up with the influx of water during heavy rain, leading to rapid levels of wet well fill and potentially causing system overload or even overflow.

Understanding the function of each component is crucial for troubleshooting. A clogged check valve can impede the operation of the follow pump, creating severe problems in managing water levels during rainy periods.