Fresh water drain valve on a 2019 Bigfoot 10.4 location?

No problem! Glad you found it!

Thanks, found it (after not noticing it during the fifty or so times I’ve dumped already, too logical a spot).

Here’s another view

Located in the dump valve compartment to the left of rear entry door on our 2008 10.4

Try these people, by telephone:

Sasquatch Secrets