Expresso

The Dinner Party Dilemma: How to Serve 6 Lattes...

Picture this: You’ve just hosted a flawless dinner party. The plates are cleared, the ambient playlist is hitting the right notes, and then someone says it: “I’d love a latte if...

The Dinner Party Dilemma: How to Serve 6 Lattes...

Picture this: You’ve just hosted a flawless dinner party. The plates are cleared, the ambient playlist is hitting the right notes, and then someone says it: “I’d love a latte if...

Pressurized and non-pressurized portafilter baskets side by side

Pressurized vs Non-Pressurized Portafilter Bask...

Updated August 2026 · Written by the Kairos Coffee team Pressurized vs non-pressurized portafilter baskets is a parts decision, not a cleaning ritual. A pressurized (dual-wall) basket builds brew resistance...

Pressurized vs Non-Pressurized Portafilter Bask...

Updated August 2026 · Written by the Kairos Coffee team Pressurized vs non-pressurized portafilter baskets is a parts decision, not a cleaning ritual. A pressurized (dual-wall) basket builds brew resistance...

Worn espresso group head gasket beside a new rubber seal and portafilter

Espresso Group Head Gasket Replacement: When an...

Updated August 2026 · Written by the Kairos Coffee team Espresso group head gasket replacement restores the rubber seal that the portafilter locks against so brew water stays in the...

Espresso Group Head Gasket Replacement: When an...

Updated August 2026 · Written by the Kairos Coffee team Espresso group head gasket replacement restores the rubber seal that the portafilter locks against so brew water stays in the...

Flushing an E61 group head into a pitcher before pulling espresso

E61 Cooling Flush: Why and How (HX vs Dual Boiler)

If you own an espresso machine with an E61 group head, you have likely heard the advice to "flush the group until the sputtering stops" before pulling a shot. This...

E61 Cooling Flush: Why and How (HX vs Dual Boiler)

If you own an espresso machine with an E61 group head, you have likely heard the advice to "flush the group until the sputtering stops" before pulling a shot. This...

Heat exchanger and dual boiler home espresso machines on a kitchen counter

Heat Exchanger vs Dual Boiler for Home Baristas

For home baristas stepping up from entry-level setups, the choice between a heat exchanger vs dual boiler espresso machine is the ultimate fork in the road. If your daily routine...

Heat Exchanger vs Dual Boiler for Home Baristas

For home baristas stepping up from entry-level setups, the choice between a heat exchanger vs dual boiler espresso machine is the ultimate fork in the road. If your daily routine...

Espresso machine pressure gauge near 9 bar during a home shot

OPV Espresso Pressure Adjustment Guide: What It...

If you have spent any time in home barista forums, you have likely run into the acronym "OPV." The Over-Pressure Valve is one of the most critical yet misunderstood components...

OPV Espresso Pressure Adjustment Guide: What It...

If you have spent any time in home barista forums, you have likely run into the acronym "OPV." The Over-Pressure Valve is one of the most critical yet misunderstood components...