Why is my coffee machine not producing enough pressure?

Why Your Espresso Falls Short — And How the Right Pump Changes Everything

You’ve preheated the machine, ground the beans fresh, and tamped with precision — but the shot runs too slow, or worse, too fast. The crema is thin, the flavor is weak. The culprit? Insufficient extraction pressure.

But why does this happen? And more importantly — can it be fixed?

Let’s break down the most common causes — and how the right pump makes all the difference.

🔍 Common Causes of Low Pressure in Coffee Machines
Worn-Out or Underpowered Pump

Many entry-level machines use low-duty diaphragm pumps that can’t sustain 9 bar consistently. Over time, performance drops — especially in high-use environments.
Air in the System or Clogged Filters

Air pockets or mineral buildup can disrupt flow, leading to pressure fluctuations.
Poorly Designed Pump Control Circuit

Even with a good pump, bad electronics can fail to regulate pressure smoothly.
✅ The Solution: A Dedicated High-Pressure Solenoid Pump
Enter the 28DCB (SP-12A) High-Pressure Solenoid Pump — engineered to deliver stable 9 bar pressure, shot after shot.

Why it works:
✔️ Precise pressure control for consistent extraction
✔️ Compact design fits seamlessly into home and commercial machines
✔️ Long-life motor withstands daily high-demand use
✔️ Low noise ensures quiet operation in cafes or homes
It’s not just about power — it’s about reliability you can count on.

✅ Real-World Impact
Home users: Finally get that creamy, aromatic espresso they’ve been chasing.
Café owners: Reduce machine downtime and maintain customer satisfaction.
OEMs: Upgrade your design with a proven, drop-in pump solution.
✅ Conclusion
Low pressure isn’t just a “machine quirk” — it’s a symptom of an underperforming core component.

If your coffee machine struggles to build or maintain pressure, the pump is likely the weak link.

Upgrade to a purpose-built solenoid pump like the 28DCB(SP-12A), and transform every cup from “meh” to masterpiece.