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Ball Check Valve


SKU# K125

Flat Rate Shipping only $7.99 only from Northern Brewer

Install in a regulator or wye fitting to prevent beer from entering the gas lines or your regulator.


Availability: In stock

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Product Details

Install in a regulator or wye fitting to prevent beer from entering the gas lines or your regulator. 1/4" MPT end screws into regulator body or wye adapter (K035), the 1/4" MFL end fits a barbed swivel nut (K123) or our tubing kits (KX03-KX04).

Additional Information
Support Documents:No
4.3 / 5.0
6 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Not Compatible with Taprite Regulators
I can't speak to the functionality as the check valve will not fit.
Kelly nailed it in a prior review...the threading/size looks close, but is not compatible with my Taprite double-gauge regulator I got with my kegging setup. Not really worth a return for a $3.99 item and the problem was noted in the October 2015 review...pays to do one's homework.
August 9, 2017
8 months ago
Ball check valve
Item is as described, great for replacing worn out fittings!
March 16, 2017
1 year ago
Check, check
No back flow. That's what I like about them!
September 28, 2016
April 4, 2016
Not for Taprite
This looks just fine but will not fit a Taprite regulator shutoff valve like the one that came with my kegerator.
October 3, 2015
Response from Northern Brewer
I'm sorry to hear the part didn't work with your kegerator setup. If you'd like to give us a call or shoot us an email

we can set up a return for a refund of the cost of the item if you'd like. Cheers. -Tyler
November 21, 2016
Northern Brewer
Fast delivery, i'm working on my own tap system and this piece is all I needed to finish it.
November 9, 2013
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 3 questions Browse 3 questions and 11 answers
Do you need a gasket in order to attach to a gas line to a keg?
A shopper on Dec 23, 2016
BEST ANSWER: Hi, mine is used on a regulator. The answer is yes, whenever you use a flared MFL fitting to connect to a female fitting such as a barbed swivel nut (SKU# K163), you must use a flared nylon washer (SKU# K127). Without the washer in place, you will leak gas / beer and not have a seal.
What is the direction of the check?
M J on Dec 19, 2015
BEST ANSWER: Hello Mike,

Thank you for choosing Northern Brewer! The check valve is upstream, in that it allows the CO2 to flow to the keg, but does not allow liquid to flow back towards the regulator.
I have the Last Straw Bottle filler and my air distributor has barbs. can I replace the barb with this to accommodate the Last Straw, or do I need to replace the entire shutoff valve?
Thomas S on May 3, 2016
BEST ANSWER: You could do that, but it may be difficult to remove the barbed shut-off from a gas manifold. And as the ball check valve has no shut-off, it would be "open" any time the gas was on, and could not be shut off, except at the regulator. It would be better to add an MFL-threaded shut-off valve; or add a Wye-splitter to the regulator with two MFL ports; or put a "tee" fitting in a gas line to split it to two lines. I think the simplest solution would be to split a gas line with a "tee", rather than to try to modify your gas manifold. -Mike W, Northern Brewer

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