Quick fix: Find your machine below to see its basket size and which baskets ship in the box. Not listed? Flip your basket over: one tiny hole underneath means pressurized, holes across the whole floor mean non-pressurized.
Checked 26 Oct 2026 by the PCA Editorial Team · All espresso fixes
Grinding finer and nothing changes? Shots gush no matter what you do? Before you blame the beans, check the basket. A pressurized (dual-wall) basket does the resisting for you, so your grinder’s dial goes quiet. A single-wall basket hands that job back to the coffee. Here’s what the big-name home machines actually ship with, straight from the makers’ own manuals and spec pages.
Basket finder by machine
| Machine | Basket size | Baskets in the box | What that means for you |
|---|---|---|---|
| Breville / Sage Bambino (BES450) | 54 mm | Single wall and dual wall, 1-cup and 2-cup, in many markets (Canada lists dual wall only) | Fresh beans and a grinder: single wall. Pre-ground: dual wall. |
| Breville / Sage Barista Express (BES870) | 54 mm | Single wall and dual wall, 1-cup and 2-cup | It has a built-in grinder, so the single-wall basket is the one to learn on. |
| De’Longhi Dedica Style (EC685), Dedica Arte, Stilosa | 51 mm | Double-wall (pressurized) filters, plus an E.S.E. pod filter on the Dedica | Dial with dose, freshness and shot volume; grind tweaks barely register. |
| Gaggia Classic Pro (E24) | 58 mm | Commercial single and double baskets, plus a pressurized double basket with a two-way pin | Use the commercial baskets with a burr grinder; the pressurized one is for pre-ground. |
The two-minute check for any machine
- Take the basket out and turn it over. One small hole (or a few) under a perforated floor: pressurized. Holes everywhere: non-pressurized. A removable perforated disc on a solid cup: pressurized.
- Measure the inside diameter. Baskets and tampers must match it; 58 mm parts won’t fit a 54 mm or 51 mm portafilter.
- Check the manual’s accessories list for “dual wall”, “double wall” or “pressurized”.
The bar number on the box (15, 19, 20 bar) tells you nothing about the basket.
Which basket should you use?
Pre-ground coffee or no burr grinder: stay pressurized, it’s the right tool. Fresh beans and a grinder that can go fine enough for espresso: switch to single wall and make grind your main dial. For the full side-by-side and how to dial in each, read Pressurized vs Non-Pressurized Espresso Baskets.
Ready to dial in by taste? Our free short course Dial In Espresso by Taste covers basket types, the 1:2 ratio and sour vs bitter, with short video lessons and quizzes.
Sources
- Breville. Bambino BES450 instruction book; Bambino product page (Canada).
- Breville. Barista Express BES870 product page (accessories: 54mm portafilter; 1 cup & 2 cup single & dual wall filter baskets); BES870 instruction manual.
- De’Longhi. Pump Driven Coffee Machines (Dedica range); EC685 instructions for use.
- Gaggia North America. Classic Pro E24 (58mm portafilter); Pressurized Filter Basket Kit with 2-Way Pin.
- Whole Latte Love. Gaggia Classic Pro E24, what’s included (commercial single, commercial double, pressurized double).