I’ve had this sitting here for a while, so I thought it was time to take it apart for our amusement. I’ve not actually tested it working as there’s no convenient point for attaching water that doesn’t pose a risk of drenching an adjacent wall or carpet. Note that these units are generally only suited for 220 to 240V use. Using one on 120V would result in very little heating of the water.
It’s been pointed out that the diaphragm is actually a differential pressure device, so if the outlet was blocked the internal pressure would equalise and the power to the element would cut off. It would still potentially be a lot of pressure in the chamber though.
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