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  • What is a Rotary Pump? - Comiso Coffee

    What is a Rotary Pump?

    For commercial environments, rotary espresso machines are easily the superior choice; however, if you're a home barista with a solid budget and need the best espresso shots, they are also worth considering.

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  • What is PID? - Comiso Coffee

    What is PID?

    The temperature of your water would fluctuate if your espresso machine wasn't equipped with a PID. This change in temperature can result in a significant change to your espresso's taste. PID controllers try to anticipate what may happen in the espresso machine's environment.
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  • What is Pre-infusion? - Comiso Coffee

    What is Pre-infusion?

    When discussing espresso, pre-infusion refers to the process of adding water to ground coffee. Pre-infusion is the initial wetting and expanding of the coffee puck in the portafilter with low-pressure water before using the full eight to eleven bars of pressure for espresso extraction.
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  • What is Channeling? - Comiso Coffee

    What is Channeling?

    Channeling is when water doesn’t flow evenly through the coffee bed. It is, essentially, a barista’s worst nightmare. Water not flowing evenly means that your coffee won’t extract properly. It all comes down to three factors: Grind size, tamping, and water flow within the actual espresso machine.
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  • Dual Boiler vs Heat Exchanger - Comiso Coffee

    Dual Boiler vs Heat Exchanger

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    Espresso machines aren’t just for espresso. They’re also for making steam, and lots of it. Sure, espresso is a great drink by itself, but it is the lattes and the cappuccinos that really conquered the world. And making quality dry steam isn’t an easy feat.
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  • What is the E61 Grouphead? - Comiso Coffee

    What is the E61 Grouphead?

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    The E61 is to many the definitive group head, and it’s not hard to see why. It offers several perks that you just can’t find in other products; and they will most definitely elevate your game, helping you brew even better coffee. Let's explore what makes this tech extra special.
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  • Tamper Showdown: Flat vs Convex Tampers - Comiso Coffee

    Tamper Showdown: Flat vs Convex Tampers

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    A tamper is a necessity for anyone who makes espresso for any length of time. Tampers of the highest quality are also heavier. The device compresses espresso grounds in your espresso machine's portafilter into a coffee puck, allowing you to create a balanced shot every time.
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  • How to Make Café Con Leche - Comiso Coffee

    How to Make Café Con Leche

    The influence and reach of café con leche makes itself known thanks to the Cuban diaspora, which brought with them their coffee culture and have shared it with the rest of us. Nowadays, there are many popular Cuban-style places where you can get delicious, authentic café con leche.
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  • Benefits Of A Dual-Boiler Espresso Machine - Comiso Coffee

    Benefits Of A Dual-Boiler Espresso Machine

    The boiler still is one of the most, if not the most important parts of an espresso machine. Modern boilers have a heating element that works by rapidly heating up the boiler so that the water reaches the desired temperature. Right off the bat, many people notice that there are obvious advantages to having two boilers instead of one.
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  • The Right Water To Use For Espresso Machines - Comiso Coffee

    The Right Water To Use For Espresso Machines

    Baristas are, in reality, water magicians. After all, coffee is more than 90% water and it has an enormous influence on the taste of your coffee. Which is why we’ve decided to dedicate an entire article on finding the right water for your espresso machine.
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