Got SUB problems?

Not a problem! Like all appliances sometimes The SUB may need a little more TLC. More commonly than not, it's a straightforward fix. We've come up with some maintenance tips, troubleshooting and frequently asked questions that should help you to keep your SUB in tip-top condition!

Where should I start?

The beauty of The SUB is that it is very low maintenance... No difficult cleaning or setup. We have a few tips and tricks to get the most out of your appliance. Want to see it in action? Watch it in the video!

We have tips on cleaning, care and recycing but if you scroll to the bottom of this page we also have some FAQs, including troubleshooting and product details. 

Go to FAQs



  • We advise you keep your SUB Kegs in the fridge to pre-chill
  • Pre chilling will reduce cooling time in The SUB
  • Do not freeze or store in direct sunlight
  • Store the SUB Kegs below 30°C
  • Unplug your machine when not in use
  • Do not remove the SUB Kegs until they are empty
  • The machine should stay ON whilst a SUB Kegs is in there

Clean after each use


  • Unplug your machine before cleaning
  • Use a damp cloth to clean the exterior of the appliance
  • Use a dry cloth to clean the inside of the cooling chamber
  • Rinse the drip tray with warm water
  • Never fully immerse the machine in water
  • Use a mild soap
  • We recommend wiping down after each keg also  

Clean long termClean every 3 months

  • Unplug the machine before maintenance 
  • Clean the inside of the tap spout with a warm, wet cotton bud
  • Clean the tap handle mechanism with a wet cotton bud or a damp cloth
  • Vacuum the bottom of The SUB, to get rid of any dust that may have collected



  • All our SUB Kegs are made from PET and can be recycled with your other plastics
  • The actual recycling depends on the local waste collection system and policy
  • Check the recycling systems and policies in your local area

Watch the video!


I have plugged in The SUB and connected a keg. When I can start tapping?  

Once the beer is chilled to the right temperature, the light on the front of The SUB will turn green. The beer is at the optimum temperature and can now be tapped.

Do I have to wait until it turns green?

Pouring before the keg is fully chilled will produce a lot of foam. It won't harm you, but we don't recommend it. For the optimum experience, it is best to wait.

Should the device remain switched on all the time during use?

When there is beer in the keg it should remain on to keep the beer chilled and fresh for 15 days. This will also keep the correct pressure. If the chamber is empty, you can turn the appliance off.

How long does it take to cool a SUB Keg?

We advise pre-chilling your kegs for 6-8 hours in the fridge before use. If appliance and keg are at room temperature it will take around 10 hours to cool.

How do I load a SUB Keg into The SUB?

Remove the top of the keg sleeve along the dotted line. Then remove the cap and take the tube out. Push the tube into the opening until you hear a "click" sound, this is very important. Now slide the SUB Keg into the cooling chamber, make sure it goes right to the end. Then open the tap cover and guide the tube into place. Snap the beer valve in its position in the tap head. Close the tap cover, close and lock The SUB door and you're done.

Where should The SUB be placed?

The small footprint means it will fit on any countertop. Place it on a flat, clean and dry surface with access to main supply. We also advise customers to leave enough space around the machine, to make sure that it can cool.

How to setup the SUB?

Read our step by step guide  

What is the volume of a SUB Keg?

The kegs hold 2 litres of beer. 

What is the size of The SUB?

The SUB is 45.5 cm  x 23.5 cm x 32.6 cm and weighs 6.8 kg

What are dimensions of The SUB Compact?

THE SUB Compact is 45.3cm (excluding drip tray) x 19cm x 37.5cm (l x h x d) and
weighs 4.45kg

Is The SUB battery powered?

No, The SUB plugs into the mains power  with a 90cm power cable. It’s extremely energy-efficient with a rating of A+.

Is it easy to draught beer from the tap?

The SUB makes it very easy to tap pub quality beers from your home.

Read our step by step guide  

My SUB light is red

This usually means the kegs are cooling. If you pre-chill your kegs before use, this will be a lot quicker. If the appliance and keg are at room temperature it can take 10 hours to cool.

If the red light persists, try pouring a little beer. This might trigger it to turn green.

When I try to tap a beer, I only get foam. How did that happen?

There can be several causes of this:

  • Sometimes the first glass you tap can largely be foam
  • Sometimes the tube will fill with gas if you haven't drawn the beer through the tube yet
  • If the temperature of the beer is too warm or too cold
  • The beer is not tapped correctly: To tap, you must open the tap handle quickly and pull it down fully. Tilt the clean glass at a 45° degree angle, keeping the glass close to the tap. 

Is it normal to get a glass full of foam with the first tap?

Yes, the first glass from a new keg will primarily be foam, so don't panic. However, if the amount of foam is the same in the next, it is possible the keg is not cold enough.

Can I adjust the temperature of the drink?

No, the appliance will chill the beer to 2° C.  

Krups SUB is making noise, is this ok?

Indeed, it does make a humming sound when it is cooling. It can  also make a similar noise when it is pressurising and when you are draughting a beer.

What do I do if the light won't turn on?

Once in the machine, a SUB Keg takes 10 to 16 hours (depending on starting temperature). When your beer is chilled to the right temperature, then the light on the front will turn green. To expediate the process, you can pre chill your kegs in the fridge.

The temperature of the SUB Keg depends on the temperature in the fridge and how long it has been in the machine. If the temperature of the room is above 30 °C and the SUB Keg has not been pre-chilled, it can happen that the light does not turn green. The temperature of the beer in this case is within 2 – 6 °C and still cooling. Be patient, it can take a bit of time. 

What do I do if the machine is not working?

After following the instructions in the manual and reading our steps, ensure that your electrical socket is working by testing it with another appliance in. If it still does not work, do not try to dismantle or repair the appliance yourself, instead, contact customer support.

View our range of SUB Kegs