Pour at least a gallon of antifreeze mixture into each toilet tank, then flush the tank to dislodge water from the flushing channels of the toilet bowl. The antifreeze will collect in the toilet trap. To complete the winterizing, pour about a quart of antifreeze into the house main trap.Click to see full answer. Likewise, people ask, how do you winterize a toilet? Refer to the following steps to winterize a toilet. Shut off the water to the toilet at the supply stop on the wall. Flush the toilet to drain all water out of the tank. Using a sponge, rag or shop-vacuum, remove the remaining water from the tank. Disconnect the water supply from the bottom side of the toilet. Similarly, what type of antifreeze is used to winterize a house? Pipe-winterization antifreeze protects against pipes bursting down to –50 degrees F. Blend of propylene glycol and denatured alcohol creates a non-toxic antifreeze that’s safe for copper, brass and plastic (not acetate). Use full strength; suggested amounts per use: 24 ozs. Subsequently, question is, does RV antifreeze stain toilets? but RV antifreeze can stain. Therefore, it’s good to not risk any in the first place by wiping the toilet’s, the sink’s and the tub’s staining away as soon as you poured the antifreeze. Your toilet will thank you for it. And so will the sinks and tubs.How much antifreeze is needed to winterize a toilet?Handi-wrap stretched over the bowl slows evaporation. To complete the winterizing, pour about a quart of antifreeze into the house main trap. If you have your own well system, drain the water tap and dry off all parts of your pump unless it is a submerged one, which requires no special precautions.