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La Marzocco GS/3 Espresso Machine

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Product Description

La Marzocco's GS3 Espresso Machine is designed for the passionate espresso enthusiast who knows the only way to be satisfied is to invest in one of the best machines available. The GS3 is pricey, but its commercial-grade features more than balance the cost: Dual stainless steel boilers, powerful steaming functionality, PID temperature control, volumetric pump and variable hot water temperature regulation to name a few.

Features & Functionality of the La Marzocco GS/3 Espresso Machine

  • Dual Stainless Steel Boilers: A 3.5 liter steam boiler produces strong, dry and sustained steam, easily producing latte microfoam. This is complemented by the separate 1.5 liter brew boiler, which allows for excellent temperature consistency and regulation for both operations.
  • Large Internal Reservoir: 3.5 liter reservoir loads from the bottom, resting behind the drip tray, and features an opening for easy refill without removing the entire unit.
  • Convertible Water Source: Use the internal reservoir or set the machine up to directly connect to your location's plumbing.
  • Sophisticated PID Control: Tailoring your brew temperature to achieve the best extract is simple with this digital-displayed PID that utilizes multifunction keypads.
  • No Burn Wands: Double wall insulated stainless steel hot water and steam wands offer easier handling and cleaning.
  • Internal Volumetric Pump: Also known as a rotary vane pump, this quieter pump is designed to maintain a specific volume capacity that is consistently maintained.
  • Saturated Brew Group: Water is distributed evenly across the brew group, resulting in an more consistent pre-infusion and extraction rate, reducing the possibility of channeling.
  • Hot Water Tweaking: Easily select how much cold water you want incorporated into the hot water pulled from the boiler, tailoring your teas or Americanos to your preferred temperature.
  • Monster Drip Tray: If you don't setup the draining kit, no worries -- the huge capacity of the GS/3's drip tray means you won't have to empty it very often.
  • Temperature Control - With the PID interface, you can select your ideal brewing temperature based on the coffee you're using.
  • Steam Power - The GS/3 makes tons of dry steam that quickly and easily creates silky microfoam.
  • Build Quality - The commercial-grade build quality makes this machine a must for your home or cafe.
  • Price - This is one of the most expensive machines that's designed for home espresso. A good workman never blames his tools. You won't regret it :)
  • Size - The GS/3's large size takes up prime countertop real estate. If you've got it, flaunt it! Park that baby front and center.
  • Aesthetics - The GS/3 is much more utilitarian in its design and style and is not quite as sexy as some of the other machines that are available on the market.
How Does it Compare? 2017 Update! La Marzocco has made some recent changes to the GS/3 MP version. The new GS/3 MP sports a redesigned conical valve (a common repair point in earlier models), a new brew pressure manometer at the brew head, and a modified pump switch that allows for pre-infusion and manual pressure control when using the reservoir. Both AV and MP configurations now feature a new cool touch steam wand that replaces the teflon inner lining with a double wall stainless steel design.

Additional Information

Manufacturer La Marzocco
Width 15.75 inches
Depth 21.0 inches
Height 15.5 inches
Watts 1600W
Volts 120V
Programmability PID, Pre-infusion, Shot Time
Case Material Stainless Steel
Boiler Material Stainless Steel
Cup Clearance 3.5 inches
Boiler Volume Steam: 3.5 liter | Brew: 1.5 liter
Reservoir Size 3.5 liter
Solenoid Valve Yes
Cup Warmer Yes
Portafilter Size 58mm
Available Portafilters Bottomless, Non-Pressurized
Warm Up: Brew Time 15 minutes
Warm Up: Steam Time 30 minutes
Boiler Design Double Boiler
NSF Certified Yes
Pod Friendly No
Water Sources Convertible - Internal Reservoir or Plumbed in
Auto Shut Off Yes
Auto On Yes
Pre-Infusion/Aroma Yes
Material Stainless Steel

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Warranty Information for the La Marzocco GS/3 Espresso Machine

What it Covers:

La Marzocco espresso machines


- Home Use: 1 year parts and labor (GS/3 and Linea Mini)

- Commercial Equipment: 13 months parts, 3 months labor

Who Supports the Warranty: Seattle Coffee Gear
Warranty Contact Information: 866-372-4734 or email at
Eligible for SCG Extended Warranty?

Yes (GS/3 and Linea Mini only).

Can SCG Repair? Yes. Read more about our out-of-warranty repair services.

Caring for the La Marzocco GS/3 Espresso Machine

  • Clean the brew gasket daily with a cleaning brush.
  • Soap out water tank (if applicable) and drip tray every few days.
  • Perform backflush routine and clean the filter basket each week.

User Manuals for your La Marzocco GS/3 Espresso Machine

Videos Featuring the La Marzocco GS/3 Espresso Machine

La Marzocco GS/3 Brew Head Maintenance

La Marzocco GS/3 Brew Bottomless Portafilter

La Marzocco GS/3 vs Rocket R58 Dual Boiler

Compare Dual Boiler Home Espresso Machines


Near purrrfectReview by Drizmond
Very expensive, high quality and extremely consistent performer. We made the decision to purchase this machine due to the excellent espresso quality it produces even by a novice barista using all the tools provided by the PID. Justification to spend this much came down to an expected long life time of enjoyment. After several weeks of morning lattes and occasional espressos the time saving features and ready to use nature of this machine really stand out and add to our daily pleasure.

The powerful steam means I can steam milk and be finished before the shot is done, of course this makes for a small window to get it just right for latte art, however even during the learning process the results were never far off. (Posted on 4/28/2014)
La Marzocco GS3 MP thoughts after a few weeksReview by mac12563
The GS3 is solidly built and control of the variables on the machine make tweaking your shot a breeze. The controls are well thought out and easily accessible. I think the toggle switch for the steam works much better than a screw valve or having a lever control on the far left of the machine.

The machine is designed very well for placement in the average kitchen. Fitting under cabinets without issue. Overall the machine is designed to fit well in a home environment without sacrificing the technology to make a fantastic coffee.

I upgraded from an Isomac Millennium which was a great machine, and I have made many memorable coffees with it. The GS3 gives me more flexibility and ease to dial in and replicate consistent shots every time. I roast my own coffee so slight differences in the roast are not an issue because of the ease of adjustments on the GS3.

The GS3 is a tool to make fantastic coffee so knowing the tool is everything. Expectations that buying this machine alone will produce great coffee is foolish. The GS3 though makes getting there easy and simple.

I am extremely happy with the GS3 and though expensive the build and quality justify the price. I am able to produce coffee that meets and many times exceeds coffee produced on commercial machines. I recently had a coffee at Intelligentsia and though the shot was very good and pulled on a Synesso Cyncra, it was not as good as I have been able to produce at home. This illustrates that the human variable is the key to great coffee and having a great machine is not enough, but having a great machine can simplify the process without question.

Pros: Good ergonomics, exceeds design requirements for home user, great technology, great fit and finish, great brewing characteristics.

Cons: N/A (Posted on 10/2/2012)
LM GS/3 Paddle after 3 weeksReview by Marshal
Make sure that you buy the double, Strada portafilter basket, and the LM bottomless portafilter. You'll be glad that you did.
Why? The standard LM basket is ridged near the top. That prevents proper tamping unless the basket is filled with 19 or more grams of grounds. The Strada is smooth-sided. The holes are also more uniform in size. That seems to provide a better tasting extraction. The bottomless portafilter seems to provide a better coffee taste. That may or may not be the case. What it definitely does do is allow one to see the coffee extraction. Water channeling and water spraying, which indicate an uneven tamp, are obvious by looking at the bottom of the basket during extraction. So is the coffee's delightful tiger-striped coffee vortex for which LM coffee is noted.

Great Taste, Easy To Use, Commercial Grade, Quick Brewing, Easy To Clean, Quiet, Large Water Container

(Posted on 11/24/2011)
La Marzocco GS/3 -- first weekReview by Marshal
* How you use the product -- to prepare espresso; hot chocolate; tea. All good!
* Things that are great about it -- quick to heat; two boilers means no waiting. Froth milk or brew coffee when you wish; turns itself on/off; adjustable in more ways than I know.
* Things that aren't so great about it -- flawed portafilter basket design. There is a ridge that blocks proper tamping when using less than 19 grams of coffee grounds in the double basket. As a result, your espresso grind will be all over the map in attempts to correct what turns out to be a tamp issue. Buy an LM ridgeless basket and chuck the stock unit.

Quick Brewing, Quiet, Commercial Grade, Great Taste, Beautiful, Easy To Use, Easy To Clean, Large Water Container

Portafilter basket ridge (Posted on 11/3/2011)
SpecialtyReview by Eric
The GS3 is amazing with lots of coffees, but this is truly a machine designed for specialty coffee. I've worked with commerical La Marzoccos, Synessos, and Simonellis, and this little GS3 delivers nearly identical exceptional quality. At home, I use a Rocket from Seattle Coffee Gear. But I also do training and consulting for a small Espresso Bar in New Orleans that uses the La Marzocco GS3, and this machine is simply amazing in quality and consistency. EVERYTHING is commercial grade yet designed for a smaller setting.

The built-in PID allows for precise temperature control and experimentation (if you are adventurous and like single origin espresso, especially). Manual pre-infusion (which locks in fines and results in a more even extraction) is possible due to the mechanical paddle. Also, the interface shows you the time of your shots in seconds (no need to scramble for your timer). The shots are GORGEOUS when dialed in correctly. Tiger striping is easily visible and this portafilter is one of the few pro-sumer types where the espresso rolls out of the spouts in a more inward direction, falling perfectly into your demi (this is something usually only seen with large, commercial machines).

The water reservoir and drip tray are very large. The double boiler allows one to easily brew and steam simultaneously, and the steam wand is capable of commercial grade micro-foam for latte art.

Finally, the portafilter and double basket that La Marzocco issues (either VST or regular basket) are professional grade and easily allow for the type of up-dosing that is commonly used in specialty cafes today (18-21 grams). This is rare among other pro-sumer machines with smaller baskets (unless you go bottomless and switch to a larger basket). Simply put, if you want your shot to taste the way it does in your favorite specialty cafe, this is one of the only machines that will get you there consistently. Seems pricey, but offers so much more than any other machine can in its class.

Easy To Use, Commercial Grade, Quick Brewing, Easy To Clean, Great Taste, Large Water Container

(Posted on 7/1/2011)

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