Explain the DIY Water System and Temporary Fix

What happens here

The farmer explains that he had to activate his backup water supply, a 1000-gallon reserve tank, to ensure the cattle received enough water. He clarifies that the primary solar well system, which he built himself approximately two or three years prior, relies on underground 1.25-inch poly pipe. He mentions that the recent issue was resolved by simply 'jiggling the wires' at the pressure sensor, which a mouse had chewed. He highlights the robustness of his 'Mirafount' waterers, noting they withstand the constant jostling from the large cattle.

Goal: Describe the farm's water infrastructure and the immediate repair actions taken.