burlmart - I'll try to answer your question on the steel finger sized rings for opening the low point drain. On my unit, it is spring loaded so pull a little hard, but so far have not broken. My unit only has one. I usually do not worry about that short section of water tubing between the fresh water tank and the pump. I drain my holding tanks, the fresh water tank, the water heater, set the bypass valves on the water heater, dump 2 gallons of pink RV antifreeze into the fresh water tank, turn on the pump, open each of the faucets including the toilet until nice pink antifreeze flows. The "P Traps" are thus protected as well as a little protection for the holding tanks.