
The taps get very manky overtime, especially with the cider. So I'd like to replace them with some sort of blanking cap. As the threads go in, I can't put a cap like the ones on the Speidel fermentors:

I was thinking on buying some screwed hexagon blanking plugs from BES, but don't know what kind of thread these barrels use. Can anyone tell me if they're BSP and if so, what size of blanking plug I would need? Has anyone done this before, or does everyone just use those no-chill jerry cans for conditioning...?
Thanks,
Bob.