I have a red jacket shallow well pump. It's 1/2hp. The model is 50rjas. I currently do not have it hooked up to my house. I am just testing it out. After I prime it and turn it on, I do not feel much suction at the inlet hose. In fact I am not sure if I feel anything at all. Should there be noticable suction almost like a vacuum cleaner or is it a lot milder than that?