A puck screen helps a Sage or Breville espresso machine in two ways: it spreads the water arriving from the shower screen so it does not drill a hole in the middle of the coffee, and it keeps the group head cleaner. On the 54mm range it needs to be 53.5mm across, and because it takes up room above the coffee, you will usually need to reduce your dose by about half a gram. It does not fix coffee that is badly distributed in the basket.
Below: which size fits, the one adjustment to make, what it fixes and what it does not, and whether it is worth it for you.
Which puck screen fits a 54mm Sage?
A 53.5mm screen, not a 54mm one. The screen has to drop cleanly onto the coffee inside the basket, and the basket wall is a fraction narrower than the portafilter it sits in. A screen cut to a true 54mm catches on the rim and sits above the coffee instead of on it. About 1.7mm thick is the sweet spot: thick enough to stay flat under nine bars, thin enough not to eat all your headspace.
That size fits every 54mm machine: Barista Express, Barista Express Impress, Barista Pro, Barista Touch, Bambino, Bambino Plus, Infuser and Duo Temp Pro. It does not fit the Dual Boiler or the Oracle range, which are 58mm. The size guide has every model code.
The one adjustment to make: headspace
Headspace is the gap between the top of your tamped coffee and the shower screen. The puck screen sits in that gap, so adding one leaves less room. With too little room, the coffee cannot swell as it gets wet, the flow slows, and the puck presses against the shower screen.
- Start with your usual dose minus about half a gram. If you were at 18 grams, try 17.5.
- Pull a shot, then look at the top of the spent puck and at the screen.
- If you see the imprint of the shower screen or its central screw, there is still not enough room. Take off another half gram.
- If the shot now runs faster than before, grind one step finer to bring the time back to where it was.
What a puck screen fixes, and what it does not
| Problem | Does a puck screen help? |
|---|---|
| A dry crater in the middle of the spent puck | Yes. This is the main thing it fixes. Water arriving as a jet in one place is spread over the whole surface. |
| Grounds stuck to the shower screen and a dirty group head | Yes. The screen stops coffee being drawn back up into the shower screen when the pump stops. |
| A wet, sloppy puck that is hard to knock out | Often. The puck usually comes out drier and in one piece. |
| Espresso spraying sideways from one spot | Not on its own. That is uneven distribution in the basket, and water will still find the soft path. Stir the grounds before tamping first. |
| Thin, sour, fast shots | No. That is the grind. Grind finer. |
| Anything, on a dual wall basket | No. A dual wall basket makes the pressure itself through one small hole, so the coffee bed is not what limits the flow. |
How to use it, step by step
- Grind and dose into the basket as usual.
- Stir the dry grounds with a thin needle, right to the bottom, until the bed looks even.
- Tamp level.
- Lay the puck screen flat on top of the coffee.
- Lock the portafilter in and pull the shot.
- Knock out the puck. The screen either comes out with it or stays in the basket; lift it out and rinse it.
Keeping it clean
Rinse it under hot water after every use, before the oils dry. Every few weeks, soak it in espresso machine cleaner along with your basket, then rinse well. A screen with blocked holes spreads water unevenly, which is the opposite of the point.
Is a puck screen worth it?
It is worth it if you are on a single wall basket, you already stir and tamp level, and you still see a crater in the middle of the spent puck or a dirty shower screen. It is not worth it yet if you are on a dual wall basket or on pre ground coffee: the basket guide explains why, and what to change first for free.
It works best paired with a bottomless portafilter, because you can see the difference it makes on the very next shot. Our channelling guide shows what each spray pattern means.
The parts, if you want them
- 53.5mm puck screen, 1.7mm thick, for the whole 54mm Sage and Breville range
- Bottomless portafilter and puck screen together, cheaper than buying them separately
Free delivery in the United Kingdom. If a part does not fit the machine listed on its page, the return is free and we pay the postage. How returns work.