Solid iron piping was ordinarily designed with one spigot finish(basic) and one particular socket or hub stop(cup shaped). In use, the spigot of one phase was put to the socket on the previous a single and a hoop of oakum was forced down into the joint which has a caulking http://valves-and-fittings76173.livebloggs.com/82861/5-simple-techniques-for-valves-and-fittings