This is an updated version of the product training course introduced by SUPPLY HOUSE TIMES in 1979, authored by Don Arnold.
Compared to other types of piping joints in the building, the tubular type is usually installed in a less “permanent” fashion. By this, we mean that the components of a tubular drain assembly are more easily disassembled than would be the case in either supply or DWV piping. This is warranted by the need for accessibility in the event of a clog, or because a valuable item has accidentally dropped down the drain of a fixture. With its characteristic use of union and slip joint connections, the tubular system is relatively easy to open for such needs.