Question about Bosch 24 in. SHU43 Built-in Dishwasher
I just installed my Bosch dishwasher a few days ago and wondered about the same thing. The instructions for hooking up water supply and drain lines did not mention this third hose at all.
However, 'the third hose' (which appears open on the lower end, but loops up high) is attached at the other end at a point directly on the other side of the dryer wall from an opening inside the dishwasher, described elsewhere as a vent (somewhere in the manual we are advised not to place anything such that the vent could be blocked). I'm assuming that when water is pumped to the drain, since the chamber is otherwise sealed, there has to be an opening for it to breathe in air to replace the evacuated water, and conversely to allow air to leave when new water is taken in; thus both vacuum and pressure build-up are avoided.
So, although this third hose is not involved in installation, a little foresight by the manual writers would have had them mention it and put our minds at ease. Maybe we are not supposed to be curious....
Posted on Apr 01, 2011
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Posted on Jan 02, 2017
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