Remember that slides will effect trailer level when deployed and you're camping the trailer.
To calibrate how to attach this level to the trailer....
Get the trailer in a level position (as determined by a level on the inside floor) with the slides OUT. You may need to raise or lower one side of trailer wheels with boards, etc. Next, without moving the trailer off the boards, bring in the slides and attach this unit to trailer with the bubble in a centered position.
When the trailer is on level ground or the slides are out, the bubble will not be centered. But it will show level when the wheels are set at proper height prior to deploying slides.
Your goal is to have the bubble centered as you back into campsite and apply leveling blocks under one side of wheels.
When slides are out, trailer will be level even though bubble is again offset.
2021 Flagstaff 26FKBS (manuf. 3/20/2020)
2019 Ford F150 XLT-3.5EB, Ext Cab, 3.55, Max Tow, 1,910# Payload, Blue Ox 1500
2018-12 days/2019-83 days/2020-12