$5.00
Replacement drain plug for the fresh water tank on newer Travatos (with an exterior fresh water tank under the vehicle). No tool needed and no plumbers tape - it uses an o-ring (supplied) for the seal. The handle is 95mm wide (about 3.75 inches). Comes with 2 o-rings, the second one is a bit thinner.
There are 2 versions - the original and a new one with a built in tool (socket) to remove the original (square head) drain plug from the tank.
To install, tighten until the o-ring makes contact. It should spin freely until the o-ring hits. Turn about 1/2 to 3/4 turn more, then turn backward slightly;(maybe 1/8 turn?) to seat the o-ring. (thanks Dad!)