Axiom is  a general purpose Computer Algebra system. It is useful for research and development of mathematical algorithms. It defines a strongly typed, mathematically correct type hierarchy. It has a programming language and a built-in compiler.
Polybutylene is simply a type of plumbing material that was manufactured between the late 70's and early 90's. It is thought that it was installed in over 6 million homes during that time period.
Ferguson is the largest distributor of residential and commercial plumbing products, offering: water heaters, pumps, pipe, valves, fittings, equipment, faucets, fixtures and accessories. With over 1300 locations, we have what you need - when you need it and our service is the best in the business. Ferguson plumbing locations are sure to provide the right products and services for your plumbing project, from plumbing fixtures for a home or commercial pipe valves and fittings.