Are Puck Screens Worth It? Who Should Buy One

When water leaves the shower screen it hits the coffee bed in jets. On a loose or uneven puck, those jets can dig into the surface and start a channel before the bed has wet evenly. A thin metal screen on top spreads that water so the puck saturates more gently.

It also keeps the group head cleaner. Less coffee sticks to the shower screen, and the screen itself is easy to rinse. It does not fix poor distribution or a bad grind; it reduces one source of mess and one source of uneven flow.

Current good practice combines a few cheap steps: dose by weight on a scale, stir the grounds with WDT to break clumps, tamp level (see tamping technique), then add the screen. A paper filter under the puck is another option, and some machines also benefit from pre-infusion, which wets the bed at low pressure.

Check that the screen fits your basket diameter and does not touch the group head, otherwise it can stick. If shots are still uneven, work through the channeling checklist. If you already have a flat puck, even flow and a clean group, the screen is optional.

• Cleaner group head: it catches fines and oils that otherwise bake onto the shower screen and gasket. It does not replace backflushing: see the cleaning guide.
• Gentler water spread: it breaks up jets from a worn shower screen, a minor help against channeling.

1. 1

   Grind, distribute and tamp. As normal.

2. 2

   Place the screen flat. On the puck, with no gaps at the edges.

3. 3

   Lock in the portafilter. Immediately.

4. 4

   Rinse it after each shot. ; oil buildup adds stale notes.

5. 5

   Dry it fully. To avoid rust spots.

6. 6

   Remove it before backflushing.