how annoying, we're on tank water too and rely on an electric pump so every time we have power outages its the bain of my existance.

Do you have a tap connected to your tank so that you can just use gravity?? maybe at a later date look into having plumbed so that there is a tap as well so you can at least get water to help flush or rinse etc.

OR even get some hose and syphon some into a bucket.

hope it gets fixed soon

Nae x