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Warning - Hot water under pressure, risk of scalds

General

How can I get hotter Coffee?

Pre-warm the portafilter - put it in a cup of boiled water for a few minutes (make sure the ROK EspressoGC body is warm and not out of a cold cupboard etc).

Warm up your cups with some hot water before you use them also.

Do you have a guarantee?

The metal parts of the ROK EspressoGC are guaranteed for 10 years. Non metal parts for 2 years.

If a part fails, email us a photo of the part together with proof of purchase and we will post a replacement to you free of charge. Labour charges are not included in the guarantee as all the parts are designed to be easy to fit at home and no specialist skills or tools are needed.

I have a Presso. Will the ROK portafilter fit my Presso?

Yes, the portafilter is compatible with your Presso.

Can I buy spare parts?

Yes, you can order them from the shop

How do I make great espresso?

Well it could not be easier! Follow these simple steps:

How do I produce great crema?

Crema is that lovely foam on the surface of an espresso which is regarded as a sign of good extraction. It's actually an emulsification of oils within the coffee combined with outgassed Carbon Dioxide.

Perhaps the most important factor here is to use freshly roasted coffee as it contains higher levels of CO2.

Arguably the next most important contributor to crema creation is pressure. We recommend our GC model (get the GC Conversion Kit if you have an older Presso or ROK model) used with finely ground coffee. The resistance you feel when pulling down the arms indicates this pressure.

EspressoGC

How do I clean and maintain my EspressoGC?

To clean your ROK EspressoGC, simply remove the portafilter by turning to the right, knock out the coffee ‘cake’ into a bin and rinse off any remaining coffee grounds that may be left on the body. Occasionally wash with soapy water but do not put the ROK EspressoGCthrough a dishwasher. The salts will destroy the high quality finish.

Occasionally, you may want to maintain your EspressoGC more thoroughly. See video here.

See how to clean and polish the metal parts here.

How much bar of pressure do you get from the EspressoGC?

This depends a lot on how firmly you press the arms down. In normal usage expect between 5 to 10 bar.

How can I stop the portafilter unwinding when I press down?

After some time there may be a build up of oily coffee residues on the surface of the silicone screen. This can be solved by cleaning the surfaces with a cloth soaked in warm soapy water.

Follow the step by step video:

Why should I convert to GC?

Simple. More consistent results, better extraction and easier crema.

Or watch our video below:

Does the ROK EspressoGC heat the water?

No - you will need to have access to hot water. At home this is easy – when travelling maybe just take a thermos flask.

Does the ROK EspressoGC need a specific coffee brand?

No - you can use any coffee brand you like.

Does the ROK EspressoGC need a particular grind?

The coffee grind should be specifically for making espressos. The grind should be fine. If it’s coarse, the water will pass through too easily so it won’t create enough pressure. If it's too fine it might be too dense and create too much resistance.

If your are looking for grest grinds we suggest having a look at our ROK GrinderGC.

The ROK EspressoGC looks like the Presso I have seen before - is it the same?

Yes and no! The ROK EspressoGC began life as the Presso – but now it’s been completely re-tooled with 100% new parts for a sharper feel and it’s crafted from an alloy with 35% more tensile strength. The GC Conversation Kit will upgrade any older PRESSO or ROK.

Can the ROK EspressoGC produce a single espresso?

Of course you can. It's been designed to make a double espresso but using the supplied accessory spout you can make two single espressos.

It's hard to pull the arms down - why?

If the arms are too hard to pull down, STOP. The coffee might be too fine or tamped too densely.

Empty the portafilter and try one of the following:

  1. Use a less fine coffee.
  2. Tamp with less pressure.
  3. Try both 1 & 2 above.

What are the weight and dimensions of the EspressoGC?

Each ROK EspressoGC is delivered in its own shipper box w18cm x d18cm x h32cm

Total weight 2.35kg.

The ROK EspressoGC by itself has the following dimensions: w22cm x d13cm x h29cm

Weight: 2.1kg

How do I fit a GC conversion kit?

Watch our step by step video:

Why is my GC conversion kit leaking?

If the upstanding teeth on the silicone screen are not matched to the cavities in the body, then it can leak. If you run your finger over the circumference and feel lumps then try refitting it.

See our step-by-step video below:

GrinderGC

How do I make the right coffee grounds?

Watch our unboxing video to get you underway

My adjustment wheel is stuck. What can I do?

The wheel may have been over-tightened.

Follow our video to get it operational:

How do remove the burrs?

We recommend that you simply knock out old grinds before adding new beans.

If you have disassembled the burrs this will help you:

My base has lost it's stickiness. What can I do?

This shows how to clean the base:

W1 filter

Why have you created the W1 filter?

We always strive to help people craft the best coffee possible.

Watch our movie below:

Couldn't find an answer to your question?

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