Konvekta - B11-AA1-387 referenced water valve unit product produced by high technology. B11-AA1-387 became irreplaceable of foundations. B11-AA1-387 referenced product which is satisfy the customer's needs, offers advantages of quality and cost. It produced result of tests of laborotory for years. B11-AA1-387 referenced product is an original piece of your foundation or machine, original parts makes your machine live longer.