I used to work for a swimming pool service company. We would use a CO2 tank with a hose and rubber plug to blow out clogs in lines. Does anyone know where I can get some hose and the rubber plugs? The plugs allow air from the tank through the center of them and they have a compression wingnut you tighten to make it fit securely in the pipe. I cannot find the plugs and I have googled for days. I can find all sorts of rubber plugs and plugs with holes in them, but not the kind that has a hose connector on the top, a wingnut and allow air through the center. any help would be greatly appreciated.