Hello, my name is Frank, a new member to the group, I have purchased a 55 year old house in north east NY.The domestic plumbing in the house has an amazing amount of yellowish muck in them. this is not a hard scale, its kind of a mushy substance, no grit at all, it washes off from hands quite easily, I was able to get most of it out of my pressure tank but how do I get it out of the house plumbing. Is there some kind of chemical injector system that I could plumb into the plumbing that would eventually clean the pipes of this muck. Thank You, any help is sincerely appreciated, Frank.