We live in a manufactured home. We have always dealt with calcium buildup in our house. We had fine water pressure one afternoon we lost it all water pressure to the cold side in entire house. We still have hot water. If we are running hot water in one part of the house and the cold side is one then hot water water will come into the lines. We have tried to put vinegar into the lines to break up the calcium, but it hasn't worked. We tried to blow out the water lines but couldn't get anything to work. Right now I can't afford a plumber is there anything that I can do to get my cold water to work?