Leaky Ball Valves

[jmhbutler]

I'm just about finished building a keezer and have installed 5 ball-valves within my gas system, all of which are the following style:

http://www.ontariobeerkegs.com/Ball_Valve_with_Check_1_4_MPT_x_5_16_Barb_p/valvebarb-5-16.htm

When I turn or wiggle the level, a small amount of C02 is released. (I've confirmed this with the soapy water test.)

Is anybody familiar with these valves or noticed similar occurrences?