Charlotte Pipe and Foundry's updated Cast Iron Technical Manual is now available. Charlotte Pipe and Foundry manufactures a full line of service and extra-heavy cast iron soil pipe and fittings from 2"-15", and double-hub pipe from 2"-6". A full line of no-hub (hubless) pipe and fittings is also available. All Charlotte products are made in the U.S. and meet or exceed all applicable ASTM and CISPI standards. Charlotte Pipe and Foundry.