Update on this thread. I think I have a pretty workable water solution now for camping out of the back of the Jeep. I always bring a couple gallons of drinking water separately and use my "jug" water for things like boiling pasta, washing hands and dishes, brushing teeth, bathing, etc. Its potable, but I don't usually drink it, so my approach might be a bit different from someone who wants to use this as a potable water supply.
As I mentioned earlier, the bottom spout on the Wavian SUCKS. It was really the only reason I bought this versus the $16 Scepter can from Walmart (blue one) which looks almost identical but without the bottom spout. If I had this to do over again, I probably would just buy the inexpensive Scepter can https://www.walmart.com/ip/Scepter-5...pout/701144863
and then drill a hole for a plumbing fitting.
However - I had the Wavian, so I was able to adapt it for my needs as follows:
1. Luckily, the bottom threads for the spout are regular garden hose threads. I was able to use a garden hose brass shutoff coupling from Home Depot (SKU 046878279339 - $4.98), flip it around backwards and install it in the can. NOTE: make sure you use a hose gasket behind it, and seal the threads otherwise it leaks like a mofo.
2. To strengthen it, I applied some clear JB Weld epoxy
This gave me a good solid valve that won't spin around while trying to operate it with one hand.
Next was the assembly of my "faucet" system
Marine foot-operated galley pump ($31)
5/8" clear Vinyl tubing ($9) SKU 841804100349 https://www.homedepot.com/p/Everbilt-1-4-in-O-D-x-3-8-in-O-D-FIP-Lead-Free-Brass-Compression-Coupling-Fitting-800909
1/2" x 3/8" plastic barb adapter - ($2.35) SKU 88740002195
Toro 1/2" NPT "Funny Pipe" (I had a bunch of these leftover from a sprinkler project) . Even though the description says "3/8" it fits inside the 1/2 ID vinyl pipe perfectly - test fit if you buy one of these.
Then I had this in a bucket of plumbing parts and lucked out that it was the "magic missing piece" that made everything work:
Hooked all together it looks like this:
This threads into the bottom valve, just like attaching a garden hose to a hose bib, except backwards:
Detail of the "faucet" portion with the 3/8" FIP to 1/4" compression fitting:
For testing, I'm just velro-ing to the carrier. My longer term plan is to shorten the copper tubing and then make an aluminum bracket for the copper tubing and either use magnets or a spring clamp (or quick fist) to attach to the tire carrier.
Here's a quick video of it in operation: