Cleaning espresso machines - How to backflush correctly

What is backflushing of espresso machines?

Backflushing is a method of cleaning the internal components of your espresso machine, such as the shower screen, brewing group and three-way valve. The method only works on machines that have a three-way valve, i.e. all espresso machines with an E61 group head design. This means all Profitec models, the majority of Rocket Espresso machine models. See the picture below to understand what an E61 group looks like. The valve is a small valve that opens up and releases the water pressure from the coffee and deposits it in the drip tray when the brewing process is complete. When we backflush, we use this pressure to blow cleaning fluid up into the brewing components. It is important to clean the machine regularly to avoid dirt and limescale that builds up over time that can affect the taste of the coffee and the performance of the espresso machine.

Why is it important to backflush your espresso machine?

Backflushing is important because it removes old coffee grease and deposits that can cause your coffee to taste bitter and rancid. It also prevents coffee from building up on the shower screen and eventually blocking it. About If you notice that the shower screen is not flowing as much water as before, you know that it is blocked by limescale and dirt that is restricting the water flow. THEN IT IS TIME TO BACKFLOW!

How to backflush your espresso machine

The process is simple. First, perform 5 backflush cycles with detergent, then perform 5 cycles with just water.

To backflush your espresso machine you will need the following tools:

• Backflushing sink (Blind filter)
• Espresso cleaner (Our recommendation) Puly Coffee plus 900g)

Act Puly Caff plus 900g detergent

Follow these steps to backflush your espresso machine:

1. Start the machine and make sure it is warm.
2. Make sure the portafilter with the blind filter is clean.
3. Add a cleaning agent to the portafilter, approximately 3g or half a teaspoon.
4. Insert the portafilter into the machine and start the pump. Let the pump run for 10 seconds and stop brewing after 10 seconds have passed.
5. Let the machine stand for 5 seconds.
6. Repeat steps 4 and 5, five times.
7. Remove the portafilter and rinse it thoroughly with hot water.
8. Start the machine without the portafilter for a few seconds to flush out any detergent residue.
9. Replace the portafilter and perform the entire backflush cycle again without detergent 5 times. Tip! About If you find that the water still looks white and soapy, you can continue backflushing without detergent until the water looks clear and clean.
10. When you're done, clean the portafilter again, put the regular filter basket back in, and now you're ready to brew. espresso!

Squeaky handle after backflush

Some people find that the handle may start to squeak after backflushing. This is completely normal and is due to the components being dried out by the cleaner. After a few brews, the problem should resolve itself as the coffee oils will provide some lubrication. About If the problem persists, you can lubricate the cam mechanism with a food-safe lubricant. Our recommended lubricant is Molykote 111 compound (silicone grease). 

How often should you perform a backflush?

The recommended frequency may vary depending on how often you use your espresso machine and from manufacturer to manufacturer, so check your user manual first.

Our general recommendation based on daily use:  

• Perform 5 backflush cycles with just water. (Daily)
• Perform the entire backflush process with detergent. (4-6 week interval)

Tips for maintaining your espresso machine

To keep your espresso machine in good condition and avoid problems that can affect the taste and quality of your coffee, follow these tips:

• Use the best water possible.
• Brush and wipe the shower screen clean. (Daily)
• Perform 5 backflush cycles with just water every day (the days you use the machine/daily).
• Leave the filter baskets and portafilters in detergent and hot water (4-6 week intervals)

Summary

Backflushing is an important part of cleaning your espresso machine and keeping it in good condition. By backflushing your espresso machine regularly, you can keep it clean and in good condition, while also preventing old coffee grounds and deposits from settling on the shower screen and blocking the water flow. Therefore, it is important to backflush your espresso machine to keep your espresso machine clean and in good shape so you can enjoy a delicious and reliable cup espresso every time you brew.