Camco Sewer Hose Seal, Flexible 3-in-1 #39318

The Camco 3-in-1 Flexible Sewer Adapter is a black, flexible fitting  that makes connection to a sewer inlet easier and less hands-on, even  when the inlet threading is stripped or dirty. Instead of twisting the  4-in-1 adapter into the threading on the dump station, put the 3-in-1  adapter on the bottom of the 4-in-1 and simply press it into the dump  station. The ridges on 3-in-1 will keep the sewer assembly firmly in  place. The 3-in-1 can also be used without the 4-in-1 adapter, by  placing the sewer hose directly in the 3-in-1. Adapter is compatible  with 3" NPT, 3-1/2" NPT, and 4" NPT sewer inlets and features wings for  easy removal, with holes in the wings to attach a rope if desired.  Patented.