HELP!!! I tapped a 1 inch line from the house main and it goes through the foundation wall to the back flow device (Torro) and to the 8 station manifold. My question is what hardware should I install between the back flow device and the manifold that I will use to service the system before winter?? Do I use air fittings or special PVC nipples?? How and where will the air compressor be attached to purge out the residual water?? Also what position and settings should the valves and back flow devic...
