Thinking of making a spring off RP called "Stranded OOC Death Match" where everyone chooses weapons and fights to the death over the various aspects of usable/drinkable water. 

As Grothnor said, and perhaps this is my fault for not being more descriptive, the water purification equipment allows survivors to streamline the creation of drinkable/purified water. It also allows for the removal of poison, and yes whilst most bacteria and viruses can be boiled to shit, there are some that leave behind toxic by products. Makeshift filters using sand and rock (like you did in school, if you live in a country where they teach you things only relevant to a nuclear fallout), will remove sediments etc. The purification system does all this and more, and quicker, allowing survivors to fully disinfect and purify water for drinking. 

That was the intent, anywho.