Thank you for replying to my Post, since looking at floe, i have realised there is more work to be done, so will not go this way for now. So still panicking, as weather is imminent freezing conditions, i have opened all taps and run the pump, which has emptied about 6 pints of water out the system and showing empty on the Lunar computer also the grey water tank, but the system is still bubbleing, with water in the pipes, I also cannot find any drain plugs , only the fresh water tank plug, (the handbook is useless) would you recommend getting Non Poison antifreeze for caravan fresh water systems ???? i contacted a caravan dealer and he has never heard of that type of antifreeze, I am so use to a motorhome with all equipment ontop within the cab and lounge, water tanks/pumps/boilers etc, but did not realise all in underneath the Lunar Vehicle, live and learn. If anybody has a Lunar Landstar motorhome RL, please would you get in touch, as i so need help in a learning curb, if you have the time, simple questions like, the boiler, does it have a dump valve ??, will putting the heating on(gas) affect the boiler if it does not have any water in it ?? etc, i understood my other Motorhome system by all you help and input, but now i start again, keeps my grey matter working and to not getting even older Lol, (which i am) thanks guy's for reading any any help you can give but please keep it simple, appreciated.