What size accessories do I need for the Breville Dual Boiler and Oracle?

Both the Breville Dual Boiler (BES920) and Oracle (BES980) use a 58mm grouphead. You need 58mm portafilters, tampers, puck screens, dosing rings and dosing cups.

What is the Stainless Steel Diffuser Plate and do I need one?

The stainless steel diffuser plate replaces the plastic stock diffuser on Breville 58mm machines. It improves water distribution and durability, and works best paired with the high diffusion shower screen.

Does the Breville Oracle take the same accessories as the Dual Boiler?

Yes — both machines share the same 58mm grouphead design so portafilters, tampers, puck screens and other accessories are fully interchangeable.

Breville Dual Boiler/Oracle

Q: What is the High Diffusion Shower Screen and is it worth it for a Dual Boiler or Oracle?

Yes — the high diffusion shower screen is one of the most popular upgrades for Breville 58mm machines. It replaces the stock shower screen with a precision-engineered version that distributes water more evenly across the puck, reducing channelling and keeping the grouphead significantly cleaner.

The Breville Dual Boiler and Oracle are Breville's flagship home espresso machines — and they use a 58mm grouphead, the same standard as commercial equipment. Every accessory below is precision-matched for 58mm, from bottomless portafilters to tampers, puck screens and distributors.

What should I upgrade first? +

Bottomless Portafilter — The most impactful upgrade. See your extraction in real time and dial in consistency fast. The 58mm format gives you access to the widest range of aftermarket portafilters available.

High Diffusion Shower Screen — A popular upgrade for Dual Boiler and Oracle owners. Replaces the stock shower screen with a precision-engineered version for more even water distribution and a noticeably cleaner grouphead.

Stainless Steel Diffuser Plate — Upgrades the plastic stock diffuser plate to stainless steel. Works best paired with the high diffusion shower screen for maximum extraction consistency.

58mm Tamper & Distributor — If you're still on the stock tamper, a barista-grade 58mm tamper is an easy win. Pair it with a distributor or go straight for a 2-in-1 combo.

Read the full Breville Upgrade Guide →

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Breville Dual Boiler/Oracle