Can you bung a combined cold feed and vent?

[Rybo_1]

Never had an experience of having to do this but if it's a combined cold
feed and vent can you still bung it the usual way?

 

[TerryH]

I've not tried one....yet, but I don't see why it shouldn't work; the principle remains in setting up an air lock whether you use two bungs or one. Other hidden away aav's notwithstanding.
Terry H

 

[mountainman]

Yes you can.

 

[Pongo]

I had to bung one of these a few months ago. It had single inlet pipe for cold tank leading to CH header under loads of insulation. I nearly mistook the CH inlet pipe ball valve for the that of one on the CH feed! Drained and bunged ok . I cut in a ball valve lower down later on.