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Technical Specifications
| Boiler Type |
Dual boiler (independent brew + steam) |
| Brew Boiler |
3.4L stainless steel (shared, 2-group) |
| Steam Boiler |
7.0L stainless steel |
| Temperature Control |
Dual PID, La Marzocco Pro App compatible |
| Pre-Infusion |
Mechanical Paddle (MP) or electronic pump ramp (AV/EE versions) |
| Portafilter |
57mm stainless steel |
| Pump |
External rotary pump (included) |
| Group Head |
Saturated, thermally stable; Piero group caps |
| Water Supply |
Direct plumb only (commercial machine — no reservoir) |
| Power |
3,600W standard (4,600W high-element option available) |
| Dimensions (W × D × H) |
762 × 584 × 559 mm / 30" × 23" × 22" (2-group) |
| Weight |
64 kg / 141 lbs (2-group) |
| Warranty |
13 months (parts and labor) |
What It Pairs Well With
The GB5 S is a commercial 2-group machine designed for high-volume café use. It pairs best with commercial-grade grinders:
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Mahlkönig E65W Grind-by-Sync — La Marzocco's official partner grinder for the GB5 series; integrates via WiFi to auto-adjust grind based on shot time feedback from the machine
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Mahlkönig E65S GbW — the standard high-performance commercial pairing for GB5 installations without the Sync system
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Nuova Simonelli Mythos — a strong alternative at the commercial tier
Our showroom's Eureka Atom 75 demonstrates the GB5 S at the grinder performance level we carry. Our team can advise on commercial grinder sourcing for café and multi-group installations — book an appointment.
See It In Person at Our Berkeley Showroom
Most of our customers love to try before they buy — and we encourage that. Come visit our showroom in Berkeley, CA and see this machine running alongside the espresso equipment it pairs best with. Our team will walk you through the settings, workflow, and how it fits your coffee routine.
Book a free showroom appointment — no pressure, just great coffee and honest advice.
Why Buy From Kanen Coffee?
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Berkeley showroom — see the GB5 S running in a full café-style setup
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In-house repair technicians — we service what we sell, including La Marzocco commercial machines
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Commercial installation guidance — we'll walk you through plumbing, electrical, and workflow setup
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Authorized La Marzocco dealer — full manufacturer warranty honored
🔧 Having an issue? Visit our La Marzocco espresso machine guide — free step-by-step fixes for the most common problems. Or book a repair at our Berkeley shop.
✓ Authorized Dealer of Lelit, Breville, Eureka, Baratza & Mahlkönig | ✓ We service what we sell | ✓ Free shipping over $49
