gas check valves

Hey all you smart guys out there

I just purchased a couple of 1 way gas valves for my kegerator and counter flow bottle filler

they are the ones that Grain and grapes sell




Now they state which end is the Gas in and which is the Gas out

I had attached the black end facing towards my gas regulator so the gas flows through the black end out out the silver end

However No gas comes through

I also tried turning it around so the gas comes in to the silver end and comes out the black end

same deal


I have set my pressure to 10 psi for my serving pressure in the keg and for it to carb up


i just use the set and forget method


The reason i found out it isnt working

is becuase i run a t-piece duotight fitting with 1 line that goes to the counter pressure bottle filler the other end goes to my kegertor


Should i connect the 1 way gas valve before the t- piece rather then 1 either side that leads to kegerator and c.p.bottle filler?

its just weird these things are not allowing gas to flow through


Cheers and Beers and a merry christmas to you all

Thanks Gash for your response , i agree with what you had said and that was my plan but i wasnt able to get co2 through doing it that way until i did it from the reg to the t piece

i will play with it a bit more once this keg empties as it could have just been the numnut that installed them which was me lol..

hope you and your family had a great christmas

cheers