As Easy As 1-2-3:
Regardless of which model Rialta you own, if you use a 24" spirit level and take a reading of the "front-to-back" tilt in relation to the refrigerator, you should not have to lift one end of the level any more than 2-1/2" in order to keep the bubble centered within the level.
Lift one end of the level until the bubble is centered.
Measure the distance that you had to lift one end.
This measurement should not exceed 2-1/2".
