These can easily be installed over your water pipes without any tools... making set-up quick and easy. You put two of our units on the cold water line where it enters the home. The last softener needs to be installed on the output pipe of the hot water tank. Our standard size softeners are designed for maximum flux strength on pipes with 3/4" to 1 1/4" in diameter. They are Made in American and use neodymium magnets (the strongest type of magnets on earth).