Whether good news or bad, NO NEWS is the worst when you're waiting on something. I hate lack of communication. I hope you can escalate this. You probably already did but remind them of the flood they already caused. NxStage ought to know how vital machine parts are to their customers. I know this doesn't help but thought I remember on an old thread someone saying that NxStage sends out an entire kit (drain line, blue water line, etc) whenever one piece of it gets jacked up. Maybe they are out of "kits" but still, that's no excuse for not keeping enough in stock or not calling you.