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Not sure about the tub but the second rack is adjustable by pressing down on both buttons simultaneously and pulling up or pushing down.
Sorry, there was a problem. Please try again later.Thank you for your interest in the LG Dishwasher (LDFN4542S) model. The LG LDFN4542S is a front control dishwasher with a stainless steel tub. It offers various features such as QuadWash® and EasyRack® Plus, with nine wash cycles including auto, heavy, delicate, normal, turbo, and others. As for "tub up and down," it seems that the term is not clear. If you are referring to the positioning of the dishwasher's tub, it's important to note that the tub's positioning is a built-in feature of the dishwasher and is not something that can be changed between "up" and "down." You can download its owner's manual through this link for more information: https://www.lg.com/us/support/product/lg-LDFN4542S.ASSESNA. ^Cris
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