Setting or Resetting a Toilet

From Stephen Hallo III, former About.com Guide

Disconnect the supply line now while you are down by it. It should only be hand tightened on to the tank. If not use pliers or channel locks to loosen it. This is will make sure that it is not on the toilet when you go to pull it up. As silly as sounds to forget to disconnect the line, it happens. Toilets aren't light and discovering that the supply line is still connected when you lift it is annoying.