Electric Boiler is a duplicate item when using K2. Please add deuterium separation as a recipe for K2's electric boiler and disable your own when K2 is detected.
K2 doesn't add an electric boiler. If you mean the one from SE, I can't use it because it only has 1 output and moving all its recipes to my boiler could introduce conflicts with some mods.
"Advanced electric boiler" seems more fitting, as it does more than just separate heavy water from normal water. I'll rename it in the next update (whenever that'll be).