I only put pink antifreeze in drains, never in water lines. You use about 40psi to blow out the water lines, drain the fresh water tank. All you need is a $2 fitting that installs in your city water connection and air, 1 gallon of pink that will go in drains ( and waste water tanks). It's kind of like blowing down a sprinkler system. It takes 2 people, one to apply the air, one to open each water faucet till the water quits coming out, including the toilet. Total time about 10 minutes. You can buy the fitting at Walmart.
