Cheap Experimental Minikeg




Introduction: Cheap Experimental Minikeg

By no means is this a state of the art 'look at me I brew stainless' device, this is an untested prototype that may not even work. I'll report back mid-January 2016 with results. I'm hoping to have created a good enough seal, and to have added enough sugar to the bottle that there is enough pressure in the bottle to deliver beer through a tube connected to the nipple on the top, but at the same time in a hope that it doesn't explode

This whole setup costs about £10 if you don't have any of the equipment, I had all of it lying around.

TIP: Don't skimp on the PTFE tape, SANITIZE, and tighten everything as much as you can.

MK2 may need a cheat/cheap gas supply.

Best of luck.

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Step 1: Gather Equipment and Tools

You will need:

- 5L water bottle (£1.10 - Tesco)
- 15mm female coupler (£1.50 - Local Plumbing Supplies)
- 15mm backnut (£0.90 - Local Plumbing Supplies)
- 15mm ball valve (£2.76 - Amazon (click here))
- 2 part hose connector (like this one) (£0.90 - Local Plumbing Supplies)
- 'Bush' to connect hose connector to coupler (£1.50 - Local Plumbing Supplies)
- 30/40cm of clear 1/2 inch tubing

21mm holesaw (or something to make a hole with)
Adjustable spanner (up to 22mm)
Locking pliers/ vice grips (whatever you want to call them)

Step 2: Make a Hole in the Lid

Using the holesaw, make a hole in the lid.

It is very important it is perfectly in the middle.

Use the dimple on the top of the lid as a guide.

Step 3: Fasten the Female Connector Using the Backnut

Pass the male end of the connector through the top of the plastic lid and secure with back nut.
PTFE tape is essential to ensure a good seal. Tighten as hard as possible with the spanner and locking pliers.
If it is loose or not straight, you will have to buy a new bottle and start again.

Step 4: Secure the 'bush' to the Assembly.

On the few threads of the connector that are showing screw on the bush and tighten as much as possible with spanner and locking pliers.

Step 5: Assemble Hose Connector and Attach to Assembly.

Make sure the rubber seal is on the bottom of the nipple part.

No rubber seal = gas leak/loss of carbonation = no beer.

PTFE the hose connector assembly onto the 'bush'.

Step 6: Attach the Tap and the Hose.

Screw the ball valve into the female end of the whole assembly (don't forget lots of PTFE tape).
Attach the hose to the other end (use a jubilee clip if it is loose).

Double check everything is as tight as possible with your spanner and locking pliers.

Step 7: Screw the Assembly Into the Empty Bottle.

Trim the hose so it is about an inch from the bottom of the container. This will avoid any sediment being sucked up by the hose.

Step 8: Test for Leaks.

Add about half a pint of lemon juice (try vinegar too, but it might leave a taste) and plenty of sodium bicarb, whack the lid on (make sure the tap is closed) and see if any gas leaks.

Better to do this, have the £1.10 bottle explode than lose a gallon of beer.

You can shake, run and watch from a distance, fun to do with children. If it doesn't explode, open the tap and you have a lovely fountain of foam for a couple of seconds.

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    5 Discussions


    4 years ago


    Do you have an update on how it functioned? held the pressure and all?

    I was thinking of doing the same with an old soda syphon machine...


    4 years ago

    Also seltzer used to be made with water, vinegar, and bicarbonate there is a ratio to use but I don't remember it, so you can always use it for a scotch and soda


    4 years ago

    like that a alot! I am looking forward to the update.
    I think you will only get about 3/4 of the beer out that way since you will be decreasing volume without increasing the gas pressure, but that is still a good amount of beer, and then you can just unscrew the top for the rest, so no worries.


    4 years ago

    I'd suggest not using a water bottle since it was never designed to hold pressure. A soda/coke/pop (whatever you call it) would be better.

    DIY Hacks and How Tos

    Nice! Now you just need a really small refrigerator and you can make the world's smallest kegerator.