Abstract: A coupling apparatus that is attachable to a substantially tubular element having a passageway extending therethrough. The coupling apparatus has a coupling body and at least one adapter. The coupling body has a passageway extending therethrough and at least one leg having at least one annular groove. The adapter has a passageway extending therethrough and a radially extending inward portion for engaging the annular groove on the leg of the coupling body for connecting the adapter to the coupling body. The adapter is connectable to the tubular element for forming a continuous passageway through the coupling apparatus.