fizz more for less
CarbSocket
tired of the hassle and cost of changing co2 tanks? the CarbSocket simplifies the process, allowing you to easily connect larger co2 tanks to your aarke carbonator pro. say goodbye to constant cartridge replacements and hello to effortless carbonation.
by alloatech studios™

the details
about the CarbSocket.
CarbSocket compatibility
the original CarbSocket was designed for an adapter with a 1" hex shaft that was approximately 1 3/8" long. we have now found that newer adapters, like the one recommended below, no longer consistently match these specifications. since we cannot control these manufacturer changes, this has led to a situation where the CarbSocket is no longer a guaranteed fit.
there have been cases where the tr21-4 connector sometimes doesn't match the one in the picture. we ordered a new one and it did, but we can't be responsible for the manufacturer changing the connector, which seems to happen randomly. the new version of the CarbSocket is compatible with the ones shown below. please verify your connector before ordering to minimize compatibility issues that are out of our control.
we went back to the drawing board and completely revamped the CarbSocket to meet the specifications of the two most popular connectors we have encountered. this new version, v13, not only handles these connectors perfectly but is also smaller and twice as strong as previous models - and we cut the price by 40%, making your journey to massive savings even more affordable.
shoot us a note on our etsy store or contact us if you have questions or concerns.
adapter dimensions change without notice, and we cannot control it - a set that fit for a year can arrive different. measure the hex shaft on the connector you own, or compare it against the photos below, before you buy. a minute here saves a return.

expanded compatibility: CarbSocket version 13
we are thrilled to introduce CarbSocket version 13, bringing even greater versatility and convenience to your sparkling water setup. this latest iteration has been meticulously redesigned to support a wider array of screw-in tr21-4 co2 connectors.
we understand that connecting larger co2 tanks to your soda machine can be a bit of a labyrinth. that is why version 13 now confidently handles more types of tr21-4 co2 adapters, ensuring a perfect, secure fit for a broader range of hose and tank setups, regardless of your specific carbonator brand. whether you sourced a slightly different tr21-4 variant or encountered a connector that previously did not quite seat correctly, version 13 has been engineered to embrace those variations.
this means you can connect your favorite soda machine to your preferred larger co2 tank with even more confidence and ease - simplifying your setup and maximizing your savings.

is your soda machine compatible?
tired of the constant hassle and expense of those tiny, frequently exchanged co2 tanks? if your current soda machine uses a screw-in co2 connector that specifically looks like the connector shown here.
and you are planning to use one of the larger co2 tank hose adapters mentioned in the product list, then CarbSocket is designed for you. it will seamlessly work with your setup, allowing you to connect to bigger tanks and enjoy significant savings - regardless of the soda machine brand you own.
most machines have room to spare, but a few do not. look down the tower at your connector: it should stand proud with open space around it. if it sits recessed in the housing or is shrouded by plastic, the CarbSocket may not seat fully. worth a quick look before you order.
specs
specifications.

- durable and reliable: made from durable PLA.
- compatible with popular adapters: works with standard hex 1" tr21-4 co2 adapters.
video
3d model.
- modeled with the FreeCAD parametric modeler
video
3d print.
- printed on a Bambu Lab X1C
gallery
every angle.






















carbsocket
recommended gear.
the shared carbonation gear plus the tools to seat a carbsocket
build your alloacart™
add the gear you want and we bundle it into your amazon cart, tagged and ready. fewer clicks, one place. it helps support alloatech studios.

aarke carbonator proour pick
premium all-steel sparkling water maker; carbonates any bottle so you skip the bottled water run.

co2 adapter hose and gauge
stainless hose with a clear pressure gauge; links a big co2 tank to the carbonator.

co2 tanks
swap the pricey little cylinders for a refillable food-safe tank, far less per fizz.

co2 carbon dioxide detector
portable co2 monitor; watches indoor levels so a big tank always runs safe.

locking extension bar set
3-piece locking extension bars; reach and seat the carbsocket without the socket slipping.

3/8" ratchet wrench
90-tooth quick-release ratchet; turns the carbsocket down snug with a fine sure click.
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instructions
installation.
the first thing you need to do is fully close the main co2 tank valve. then do all of your work and ensure everything is snug back up tight. then when you are all done, open the co2 tank valve, test for any loose fittings, and enjoy.
the CarbSocket is plastic - it will eventually break, but it has been tested many times and can tighten the adapter to a solid snug, hand-tight fit with the ratchet with no damage. cranking down on the fitting with a ratchet may also damage the carbonator. there should be a gasket in the tr21-4, so once it feels snug give it just a little more torque and stop.
- 1
assemble the tools
- connect the ratchet to the socket extension, then attach the CarbSocket to the extension.
secure the CarbSocket to the extensionthe CarbSocket is designed to secure to the extension just like any other socket. there is a groove inside the pocket that lets the ball bearing on the extension seat itself inside the CarbSocket.
choose the proper socket extension(s)the aarke pro's tower is about 14 inches deep. the newer CarbSocket is shorter to accommodate smaller tr21-4 hex heads, so you need a slightly longer extension to reach the connector inside the tower. the absolute minimum extension length is about 14 inches; longer offers better maneuverability. you can daisy-chain multiple 3/8" extensions together - a 10-inch and a 6-inch combined with a ratchet worked perfectly for me.

- 2
insert the tr21-4 adapter into the CarbSocket
- with the hose attached to the tr21-4, feed the hose through the CarbSocket with the other end towards the ratchet and the threads of the tr21-4 towards the top of the CarbSocket.
- align the tr21-4 connector with the CarbSocket opening.
proper insertion of the tr21-4 adapterthe CarbSocket lets you connect and disconnect the hose adapter's tr21-4 connector to the carbonator while the hose remains attached - its slot opening allows the hose to be inserted and removed while still connected to the tr21-4.
keep the tr21-4 connector's threads exposedthe CarbSocket is designed to prevent the tr21-4 connector from sliding through, ensuring the threads remain exposed. it also provides a pocket for the hose to flex within the extension.

- 3
prep the carbonator and tooling
- lay your carbonator on a towel on the counter top, on its side, with the bottom opening facing towards you.
- use a flashlight in one hand (or a back ceiling light) and the ratchet, with a slight tug on the hose, in the other.
get some extra hands if you need itthere are plenty of moving parts here. after dozens of tests the process became second nature, but early on it was a group effort.

- 4
connect the tr21-4 connector to the carbonator
- guide the tr21-4 adapter to the mouth of the female adapter up in the tower of the carbonator until you feel it align with the opening. make sure the threads are properly engaged before tightening.
- gently rotate the ratchet until you feel it get snug, then rotate just a tiny bit more to properly secure the tr21-4 connector to the carbonator connector.
remember: lefty-loosie, righty-tightyadjust the socket ratchet so it applies clockwise (tighten) or counter-clockwise (loosen) force depending on your needs. check it before you start.
let the hose spin and coil as you connect or disconnectthese adapter hoses like to coil up while you thread connectors. you can fix that later - focus on getting the connectors properly aligned and secured.

additional installation instructions & tips
as you probably know, the other side of the hose has a (usually) bronze fitting that attaches to the tank.
the hose will coil up as you tighten and may not slip or rotate freely. ensure the release valve is closed and that all the threads and fittings on that side of the hose are snug tight using a crescent wrench.
reverse pre-coil the hose in the opposite direction before attaching, or spin the co2 tank itself to uncoil the hose. it took a bit, but you eventually get it down.
a kinked hose at the back of the carbonator is the exact issue that inspired the CarbLift. it elevates your carbonator and gives it a secure surface to rest, with ample space for the co2 hose to connect through the access hole without bending or kinking. say goodbye to workaround stands and hello to a sleek, functional carbonation station.
use a 1" diamond hole saw. one customer's drink-station countertop was a non-wood, resin material, making it easy to drill through - if you are lucky enough to have that setup, you won't need a CarbLift and can keep your hose hidden.
one customer set the whole unit on a small raised serving tray. a rectangular tray with a flush top can be turned upside down and drilled at the back to feed the connector and hose through, and if it is large enough it holds your flavourings, bottles and accessories too - a proper station.
drilling a hole in the back of the carbonator itself is possible, but we did not need to and would not choose to: it has an inner wall and no way to know what sits behind it. treat it as the option you take only when nothing else fits.
the carb series
pairs well with.

CarbLift Pro
elevate your fizz
a custom base that raises your aarke carbonator pro so you can feed in an external co2 hose from a large tank.

CarbLift 3
elevate your fizz
the CarbLift, re-engineered for the aarke carbonator 3 - raise it and feed in an external co2 hose.
ready to fizz more, for less?
free shipping
5 from 15 reviews on etsy
returns accepted within 30 days of purchase. you cover return postage, and the item must come back undamaged. no restocking fee, and refunds are issued once the item is back with us and checked.
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