I check the float switch and the connections leading to the float switch and pump every week. Additionally, I keep 2 spare float switches onboard - just in case. At least once a week I check the packing gland drip, which is a real PITA because you have to be a contortionist in order to see it - even with a flashlight. Must have been a really small, skinny person that replaced the packing gland material a few years ago. This fat, old man would never be able to get into a space that tiny, let alone repack the fitting.