What size portafilter does the Breville Dual Boiler use?
The Breville Dual Boiler uses a 58mm portafilter (58mm).
Do standard 58mm baskets fit the Breville Dual Boiler?
Yes — the Breville Dual Boiler uses the 58mm commercial standard, so standard 58mm baskets fit. Depth and shape still vary between baskets, so check the individual entries below.
Does the Breville Dual Boiler take pressurized or non-pressurized baskets?
It uses both pressurized and non-pressurized (single- and dual-wall) baskets.
Which baskets are confirmed to fit the Breville Dual Boiler?
Breville 58mm Filter 2 Cup Dual Wall; Breville 58mm Filter 2 Cup Single Wall — each verified against manufacturer sources (listed below).
Sources
https://www.breville.com/en-us/product/bes920(archived) — Official Breville (US) product page for the Dual Boiler BES920, read firsthand 2026-07-05. States verbatim: 'Commercial grade 58mm portafilter' and 'Professional 58 mm stainless steel portafilter holds a 22g dose with Dual & Single wall filter included'; accessories list a '58mm Stainless Steel Portafilter', '58mm Razor Dosing tool', '1cup & 2cup Single and Dual Wall Filter Baskets' and an 'Integrated Tamper'.