Day Off today so made a little progress. After soaking the MP40 wet side in vinegar for a few hours, hooked that up and had the same noise. Called Brett at EcoTech, he had me hold the phone up to the dry side and said there is something wrong with it. His remedy, he is sending me a new wet and dry side, I will put the old one back in the box and mail it back to him. Can't beat that with a stick. Have the quarantine tank up and running also am making water for the Top Off tank. The one thing I have learned in this whole process, when you think you have enough water made, make another 150 gallons. Kerry, had a friend tell me about the Mre Wages P. Lime, thats what I am using.