3 ms·hate to be the one to prime the siphonby smegsicle 3y agohate to be the one to prime the siphonkragen 3y agomaybe prime it with water?bell-cot 3y agoI've not run the numbers...but mixing saturated KOH solution with plain water could still be dangerously exothermic.kragen 3y agosure, but you can fill the drain bucket with enough water to keep it from boiling over