Overview: La Marzocco GS3 Espresso Machine

The La Marzocco GS3 AV is a machine built for home baristas who want true cafe performance without stepping foot outside their kitchen. Designed around dual stainless steel boilers, a saturated group head, and an incredibly accurate PID controller, it delivers the kind of temperature stability and shot consistency you’d normally expect from a commercial setup. Whether you run it from the 2.5-liter internal reservoir or connect it directly to a water line, the quiet rotary pump ensures smooth, reliable brewing at a steady 9 bar of pressure.

What makes the GS3 special is how seamlessly it blends power and control. Volumetric dosing allows you to repeat your favorite recipe with precision, while the integrated shot timer, programmable pre-infusion, and adjustable temperature (down to 0.1°F) give you all the tools you need to fine-tune your coffee. The semi-saturated group head keeps brew temperatures rock-solid, and the pre-heating system ensures every shot starts with water at the perfect temperature.

The steaming performance is equally impressive. With a large 3.5 liter steam boiler and an insulated stainless steel wand, the GS3 produces steady, powerful steam that makes microfoam easy—even when you’re making several drinks in a row. The wand’s full articulation and 4-hole tip offer excellent control for latte art.

Built with a stainless steel body, a drainable drip tray, commercial 58 mm portafilters, and a cup-warming tray, the GS3 feels every bit as sturdy as its cafe counterparts. Two pressure gauges keep you informed, the LCD screen is simple to navigate, and the machine is NSF and ETL certified for commercial use.

Key Features of the La Marzocco GS3 AV

• Dual Stainless Steel Boilers
  A 1.5L brew boiler and a powerful 3.5L steam boiler work independently, giving you stable brew temperatures and strong, consistent steam even when you’re making multiple drinks in a row.
• Saturated Group Head
  The semi-saturated group head keeps brew temperature incredibly steady, helping you pull repeatable shots with excellent flavor clarity.
• Precise PID Temperature Control
  Adjust brew and steam temperature down to 0.1°F. This level of control lets you fine-tune your espresso to match different roasts and extraction styles.
• Volumetric Shot Dosing
  Program your shot volumes and enjoy the convenience of consistent, hands-off extractions with the press of a button.
• Quiet Rotary Pump
  A commercial-grade rotary pump delivers smooth, stable 9-bar pressure. It can run off the 2.5L internal reservoir or be direct-plumbed into your water supply.
• Programmable Pre-Infusion
  Gently saturate the coffee before full pressure builds, improving extraction and overall cup quality.
• Integrated Shot Timer
  Track your extraction time without needing an external timer. It’s built right into the display for easy visibility.
• Powerful, Cool-Touch Steam Wand
  The insulated stainless steel wand stays cool to the touch and offers full articulation. Paired with the 4-hole steam tip, it produces silky microfoam fast and effortlessly.
• Commercial-Grade Build
  From the stainless steel housing to the 58mm portafilters and drainable drip tray, every part of the GS3 is designed to last and perform at a professional level.
• Hot Water Dispenser
  Quickly access hot water for americanos, tea, and cleaning without impacting brewing performance.
• LCD Display & Simple Interface
  Navigate settings like temperature, pre-infusion, and volumetrics through a clean, intuitive display.

Technical Specifications

Boilers

• Brew Boiler: 1.5 L stainless steel (1600 W)

• Steam Boiler: 3.5 L stainless steel (1200 W)

• Insulated for thermal stability

• Automatic boiler refill

Group Head

• Type: Semi-saturated, electronically solenoid-activated

• Portafilter: Commercial 58 mm

• Maintenance: Compatible with Cafetto EVO cleaner

Pump & Pressure

• Pump Type: Rotary vane

• Brew Pressure: Adjustable; recommended ~9 bar

Temperature Control

• PID digital controller

• Brew and steam temperatures adjustable in 0.1°F increments (or °C, depending on configuration)

Dosing / Extraction

• Volumetric shot dosing (programmable volumes)

• Pre-infusion: Programmable

User Interface

• Display: LCD screen

• Integrated shot timer

• On/off timer built in

• Dual pressure gauges: pump pressure + steam boiler pressure

Steam & Water

• Steam Wand: Stainless steel, insulated (no burn), articulating

• Steam Tip: Four-hole (with optional tip alternatives)

• Hot Water Dispenser: Yes, for water on demand

Water Supply

• Reservoir Capacity: 2.5 L (removable, BPA-free)

• Or: Can be direct plumbed into water line

• Low-water shutoff: Yes

Housing / Body

• Material: Stainless steel with black plastic side panels

• Drip Tray: Stainless steel, drainable

• Cup Warming Tray: Stainless steel

Portafilters & Accessories

• Portafilters: Two (single-spouted and double-spouted)

• Baskets: Four (7 g, 14 g, 17 g, 21 g)

• Tamper: Stainless steel La Marzocco convex tamper

• Cleaning: Includes backflush blank / disc and machine cleaner

Certifications / Use

• ETL & NSF certified (suitable for light commercial use)

• Recommended Applications: Home, office, small business or coffee cart

Power / Electrical

• Maximum Power Draw: 1600 W

• Plug: Standard 15-amp plug

• Cord Length: 5 feet

Dimensions & Weight

• Height: 14 inches

• Width: 16 inches

• Depth: 21 inches