Figure 3. Collection manifolds can be configured in a variety of ways; the examples above represent only two variations. The one on the right (3b) has 15 in. more tubing, which gives it not only more overall collection area, but a wider distribution under the surface area of the mash and therefore more access points for the liquid.

Figure 4. The design of the wort collection system affects the efficiency of the sparge. The lighter areas in the tun represent good rinsing; the darker areas represent incomplete rinsing. In (a), the false bottom provides uniform washing and the capability of using the highest flow rate. In (b), the tubing manifold enables washing of the majority of grains and provides moderate flow rate capbility. In (c), the screen manifold provides localized washing and moderate flow rate capbility. Collection areas: (a) 0.125 in. holes on 0.5 in. centers; overall collection area = 7 in.2; (b) 0.03 in.2 slots @ 2 slots/in. for 48 in. = 3 in.2; (c) 6 in. X 0.5 in. diameter screen tube @ 50% open = 4.7 in.2

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