One way-valve for water drum

We use these one way check valves as breathers made by Speedflow for some of the custom alloy fuel tanks we build.
The pic below shows one attached to a Bosch fuel pump



They have a spring inside them so will only open under a set pressure but for our applications we remove the spring so it vents all the time but if fuel splashes up or the car/boat turns turtle then it seals up with the pressure of the fuel (or in your case water) pushing it closed.
Regards Andrew.

This is my "miserable old fart" solution, & it works...drill a 1/16 hole at an angle
through the cap.Too simple maybe?;..:))))). Cut a piece of rag & put over cap with a rubber band or tape if dust is an issue......oldbaz.

I don't like using those taps on the side of the drum as they are very susceptible to being broken off. Instead I got hold of a cap that REPLACES the top cap & has a tap built in. It also has an automatic air bleed to assist the water in coming out. So you just tip the drum on its side & away you go.

Unfortunatly I cannot for the life of me remember where I bought it but I know that a few of my camping friends have seen mine & gone & bought their own so they must still be available.

Cheers
Stu

Hi Moose,
I was very inventive when I had your problem and the answer was very cheap and dead reliable.
I got a skindivers snorkel purge valve and fitted it to a suitable sized hole in the lid. I was carefull choosing the hole size but it works perfectly. I also have a click hose connector on the jerry outlet and can fill it with a hose without having to lift it out. The purge valve lets the air out during filling.
If you need to buy a purge valve they are available at watersports that stock "Land and Sea" equipment for about $6 for 4 or 5.

Good luck with it.
Ian