I am planning on using Jiffy-Tite fittings for the fuel sample port on the new race car. I will be installing a female quick-disconnect like this behind the gas door:

http://www.summitracing.com/parts/JIF-21306/

The description says this fitting is valved. My questions are, does it need to be "valved", and if so, does the male plug also need to be valved, like this one:

http://www.summitracing.com/parts/JIF-22506P/

The male end will have a piece of rubber hose attached to it, and it will only get plugged into the female fitting if a sample is required. Anyone else using this setup?