help C02Leak

[Toecutter]

I'm ticked off. just went through 2, 5 gallon C02 tanks in 4 days. It started happening after i removed my guages to weigh the tank. Now I'm not sure if i lost an O ring or gasket or something. My dual guage/regulator setup has a big nut, and on the inside, an orifice, with an Allen head slot to tighten it down. I dont see an O ring in there, doesn't mean I did not lose it. i went to more beer and the guages they sell are a little different, and have an O ring on the stem. They did sell me a small grey washer of some sort with a hole in it, its about the size of the orifice. i just installed it with the new tank. I know how to check for leaks with the soap/water, I'm mainly concerned with having the correct part to stop the leak
thanks for any help

 

[Nanobru]

You need the gray washer for leak free seal. Some micro matic models have the built in rubber o ring, or a white plastic mating surface that is supposed to work. While your gauges are off, weigh em. That way you dont have to remove them to weigh your tank.