La Marzocco GS3

• Portafilter diameter: 58mm
• Basket type: non-pressurized
• Grouphead standard: 58mm commercial
• Brand: La Marzocco

Want this as a single shopping list? The parts finder shows everything confirmed to fit the La Marzocco GS3 on one page.

Compatible baskets

• IMS B70 Competition 1 Cup (B701TH26.5E) (58mm)
• IMS B70 Competition 1 Cup H18.5 (B701TH18.5N) (58mm)
• IMS B70 Competition 1 Cup H19.5 (B701TH19.5N) (58mm)
• IMS B70 Competition 1 Cup H24.5 (B701TH24.5N) (58mm)
• IMS B70 Competition Convex 2 Cup (B702TCH26E) (58mm)
• IMS B70 Competition 2 Cup H22.5 M Pattern (B702TH22.5M) (58mm)
• IMS B70 Competition 2 Cup H24.5 (B702TH24.5M) (58mm)
• IMS B70 Competition 2 Cup H26.5 (B702TH26.5M) (58mm)
• IMS B70 Competition 2 Cup H28.5 M Pattern (B702TH28.5M) (58mm)
• IMS B70 Competition Convex 2 Cup H20 (B702TCH20E) (58mm)
• IMS B70 Competition Convex 2 Cup H22 (B702TCH22E) (58mm)
• IMS B70 Competition Convex 2 Cup H24 (B702TCH24E) (58mm)
• IMS B70 Competition Convex 2 Cup H28.5 (B702TCH28.5E) (58mm)
• IMS B70 Competition NanoQuartz 2 Cup H20 (B702TFH20NT) (58mm)
• IMS B70 Competition NanoQuartz 2 Cup H22 (B702TFH22NT) (58mm)
• IMS B70 Competition NanoQuartz 2 Cup H24 (B702TFH24NT) (58mm)
• IMS B70 Competition NanoQuartz 2 Cup H26 (B702TFH26NT) (58mm)
• IMS B70 Competition NanoQuartz 2 Cup H28 (B702TFH28NT) (58mm)
• La Marzocco Advanced Precision Basket (F.3.026–F.3.028) (58mm)
• VST Precision 58mm Filter Basket (18g) (58mm)
• VST Precision 58mm Filter Basket (15g) (58mm)
• VST Precision 58mm Filter Basket (20g) (58mm)
• VST Precision 58mm Filter Basket (22g) (58mm)
• VST Precision 58mm Filter Basket (25g) (58mm)
• VST Precision 58mm Filter Basket (7g) (58mm)

Compatible parts

Portafilters

• La Marzocco Convertible Portafilter (58mm)

Tampers

• La Marzocco Standard European Convex Tamper (58mm)

Shower screens

• IMS MA200IM Integrated Membrane Shower Screen (La Marzocco) (La Marzocco saturated group)
• IMS MA200NT Nanotech Membrane Shower Screen (La Marzocco) (La Marzocco saturated group)

Puck screens

• Normcore Espresso Puck Screen 58.5mm (316 stainless) (58mm)

Dosing funnels

• Normcore Magnetic Dosing Funnel V2 (58mm) (58mm)

Comparisons

• La Marzocco GS3 vs La Marzocco Linea Mini

FAQ

What size portafilter does the La Marzocco GS3 use?

The La Marzocco GS3 uses a 58mm portafilter (58mm commercial).

Do standard 58mm baskets fit the La Marzocco GS3?

Yes — the La Marzocco GS3 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 La Marzocco GS3 take pressurized or non-pressurized baskets?

It uses non-pressurized baskets.

Which baskets are confirmed to fit the La Marzocco GS3?

IMS B70 Competition 1 Cup (B701TH26.5E); IMS B70 Competition 1 Cup H18.5 (B701TH18.5N); IMS B70 Competition 1 Cup H19.5 (B701TH19.5N); IMS B70 Competition 1 Cup H24.5 (B701TH24.5N); IMS B70 Competition Convex 2 Cup (B702TCH26E); IMS B70 Competition 2 Cup H22.5 M Pattern (B702TH22.5M); IMS B70 Competition 2 Cup H24.5 (B702TH24.5M); IMS B70 Competition 2 Cup H26.5 (B702TH26.5M); IMS B70 Competition 2 Cup H28.5 M Pattern (B702TH28.5M); IMS B70 Competition Convex 2 Cup H20 (B702TCH20E); IMS B70 Competition Convex 2 Cup H22 (B702TCH22E); IMS B70 Competition Convex 2 Cup H24 (B702TCH24E); IMS B70 Competition Convex 2 Cup H28.5 (B702TCH28.5E); IMS B70 Competition NanoQuartz 2 Cup H20 (B702TFH20NT); IMS B70 Competition NanoQuartz 2 Cup H22 (B702TFH22NT); IMS B70 Competition NanoQuartz 2 Cup H24 (B702TFH24NT); IMS B70 Competition NanoQuartz 2 Cup H26 (B702TFH26NT); IMS B70 Competition NanoQuartz 2 Cup H28 (B702TFH28NT); La Marzocco Advanced Precision Basket (F.3.026–F.3.028); VST Precision 58mm Filter Basket (18g); VST Precision 58mm Filter Basket (15g); VST Precision 58mm Filter Basket (20g); VST Precision 58mm Filter Basket (22g); VST Precision 58mm Filter Basket (25g); VST Precision 58mm Filter Basket (7g) — each verified against manufacturer sources (listed below).

Sources

• https://home.lamarzoccousa.com/product/gs3/ (archived) — Official La Marzocco Home (USA) product page, read firsthand 2026-07-04. Lists included accessories: 'Single-spouted & double-spouted portafilters', 'Portafilter Baskets: 7 gram, 14 gram, 17 gram, & cleaning basket' (standard non-pressurized baskets) and a 'Standard European La Marzocco Convex Tamper'. Note: like the Linea Mini page, this page does not print a numeric portafilter diameter — see the second source.
• https://home.lamarzoccousa.com/product/linea-micra/ (archived) — Official La Marzocco Home (USA) page, read firsthand 2026-07-04, stating verbatim that the Home-line convertible portafilter is 'Compatible with all La Marzocco Home machines along with standard 58mm tampers' — La Marzocco's own confirmation that its Home machines, the GS3 included, use the standard 58mm portafilter/tamper size.

Spot an error? The fastest fix is the source itself —send us the manufacturer page that contradicts this entry and we'll correct it and cite it. See how we verify.