Two-valve system
One valve system. Instead of the pipe there could be a port directly into the cylinder.
The piston is at top-dead-centre here.
Pours very black and opaque, with a small, tan head of fine bubbles. No carbonation visible First Sip: Mild malts with a slightly bitter, dark…
</a> Pours a slightly cloudy honey colour with a small head and not much carbonation visible. First Sip: Mild, bready malt with a faint…
Pours a clear, dark red-brown colour. Very fine carbonation visible, with a medium head. First Sip: A lot of malt, with a lot of coffee and a…