I don't know if it would make a diference but it may help keep the antifreeze from mixing back into the pool water. Non-toxic anti-freeze protects your pool’s plumbing from freeze damage like burst pipes over the winter. I've searched through the various threads, but still have a question: we've blown out all our lines, and had no problem getting antifreeze into the waterfall line (it runs downhill!) For pools with mesh covers, larger pools, or pools that open late or open green, you’ll need more winter pool chemicals. Automotive antifreeze is toxic. Champion Non-Toxic Anti-Freeze Keeps Pool Lines From Freezing. I had a company come out and close my pool last winter. However, you would have to use a very large amount of anti-freeze, or any dissolved substance for that matter, in order to significantly reduce the freezing point of a large body of water such as a pool. How would you suggest getting antifreeze into the return lines, and into the skimmer line? Part of the closing process for an in-ground pool involves plugging the pool plumbing by inserting plugs into the skimmer hole. The concern is that if you make a mistake with the pool closing this could end up costing you next spring. Common Pool Closing Mistakes. There is a special non-toxic anti-freeze made specifically for swimming pools. do not use antifreeze in the pool equipment though, blow these out or make sure that they have drained completely. (pool antifreeze is non-toxic, so you won't have to worry about getting it into the pool in the spring.) Specifically, does it get poured into the returns from the pool end, or from the pump end? If you blow from the pump side, a 6 gallon 150 psi compressor should work. Again, give us what typer of compressor you have. More options You must log in or register to reply here. Once everythng is plugged, put the mulitport on rinse to blow the water out of the filter. Put the mulitport on Winter and you should be good to go. Fact is, blowing lines clear in regions where cold climate are present is critical. It's environmentally safe and not the same as what we put in our automobiles. To winterize a skimmer, just pour pool antifreeze into the skimmer. Swimming pool lines are often quite long and buried underground to hide them from view. Swimming pool lines transfer pool water from the central body of the pool to the pool's filter and pump system. If you want to winterize your own swimming pool this is something that the average pool owner can accomplish. In my notes I see that they had somehow added antifreeze to the return lines and verified that antifreeze was coming out of the return lines before capping them off. Make sure to only use product labeled non-toxic Pool Antifreeze. So, I know that the RV (pink) antifreeze is safe for the pool, but I seem to remember from last year that it leaves a lingering slight odor to the water and makes the water a bit foamy for while after opening. If you want to winterize your own swimming pool this is something that the average pool owner can accomplish. The information the OP was looking for was not what happens to the antifreeze after you put it in and open the pool come next season.