For your 2013 Jayco Eagle Premier 5th Wheel, I recommend checking out the:
-Horst Miracle Probe Sensors for RV Black Water Tanks # T21301VP for your black water tank, and,
-Horst Miracle Probe Sensors for RV Gray Water Tanks # T21302VP for your grey water tank.
These sensors will fit into 3/8" diameter holes, and will work in place of existing holes or you can drill new holes next to the original holes. view full answer...