A CPVC Bush or chlorinated polyvinyl chloride, is similar to PVC piping. The additional chlorine in the plastic improves its fire retardancy and structural integrity. It is resistant to degradation and oxidation, like PVC, and comes in schedule 40 and schedule 80 wall thicknesses. It is a plumbing material made of highly durable thermopastic. It is the most commonly used piping in building construction in most parts of the world, outpacing ordinary polyvinyl and metal and copper alternatives. CPVC Bush is very effective.