I have an old pool with DE filter and 2-way valve (back wash / filter), Polaris with it's own pump, and heater. The skimmer is hooked up to the main drain line. Most of the connections are glued so it is hard to remove. I need to blow out the lines and I figured that if I use the drain plug from the main pump and force air in with a compressor it should blow out the returns first, then I can plug the returns and it should blow out skimmer and the main drain (when I plug the two ports in the skimmer). If I can find a plug (or make one) that have an air valve incorporated in it, would be great. Any suggestions. Thanks
Best Regards

Amir