hey hobbit,
Yes, bunnings do have the ball valves, they are around $10-15.
I'm building my manifold at the moment (see below)
I'm using a 54Litre Igloo,
1/2 inch annealed copper tubing ($5 mtr @ bunnings),
4 elbow joints ($1.50 each),
4 t-pieces ($1.80each),
a 15mm threaded t-piece to a...