If you have them, they should be underneath the rig, behind the spot where the sticker is. I seem to recall discussion about HL discontinuing installing them with 2010 models, but I may be mistaken. If there is only a single tube with a petcock valve on it, sticking out of the underbelly, that's the fresh water tank drain, not a low point drain. Low point drains (two of them) were installed to be able the drain the hot and cold water lines in the rig when winterizing.