SUB problems?

Not a problem! Like all appliances sometimes The SUB may need a little more TLC. More commonly then not, it's a very simple 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!

Krups SUB troubleshooting

Tap premium quality, brewery-fresh pints with The SUB, the popular home draught system. Load it up with SUB Kegs, The SUB will keep your beer chilled, pressured and fresh for 15 days.

The beauty of The SUB is that it is very low maintenance... No difficult cleaning or setup. We just 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!

Krups SUB problems: Answered 

We have tips on cleaning, care and recycing but also you will find some FAQs at the bottom of this article.

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!



Beer keg gifts

Amstel - 2L SUB Keg

Lager | 5.0% | 2 Litres

£ 8.49

Heineken - 2L SUB Keg

Lager | 5.0% | 2 Litres

£ 8.49

Gallia West IPA - 2L SUB Keg

IPA | 6.0% | 2 Litres

£ 15.49

Birra Moretti L'Autentica - 2L SUB Keg

Lager | 4.6% | 2 Litres

£ 8.49

Installation and maintenance

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.

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.

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  

Product details

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  

Technical support

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. 

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.