content: This thing is ok. But realize, you must hold it onto your blow out port to make it work. Therefore you need 2 people to blow out your pipes. When you are blowing out an rv, constant air pressure is the key. So, saying that, i ripped off the needle and attached an air chuck fitting to it. Now I just screw this on, attach my air hose and pop on the compressor and I no longer need to hold it in place.