Cast iron is the premier piping material for sanitary and storm drain, waste and vent applications. It has been used in these applications for hundreds of years. It is for non-pressure applications where temperatures will not exceed 212 deg F. Cast iron is the most durable DWV piping system available and can be used in all types of construction. It has high crush strength, is noncombustible and offers superior sound-deadening performance. Charlotte Pipe products are manufactured in the USA.