Should you use antifreeze in your pool? Antifreeze can help prevent your pipes from expanding and bursting in the winter. But you MUST use pool-grade, non-toxic antifreeze. And you probably don’t need antifreeze if you blow out the water from your equipment and inground plumbing with an air compressor. If you don’t blow out your lines and you do want to add antifreeze, you’ll need one gallon of pool antifreeze for every 25 feet of underground plumbing. Just never use the antifreeze that you use