Category Archives: Spunding Valve

2 X Brass 1/4″ Tees AND 2 X Barbs – back down to $9.98 + free prime ship & “Cheapest” Spunding Build Option

WYNNsky Metals Brass Pipe Fitting Barstock Tee 2 PCS 1/4″ x 1/4″ x 1/4″ NPT Female Pipe 2 PCS 1/4″ NPT X 1/4″ Hose ID Brass Hose Barb Fittings

More Info

From the product description, check product page for current description, price and availability:

Adapts 1/4″ NPT Female end to 1/4″ tube size female end to 1/4″ tube size female end at a 90-degree angle
2 PCS 1/4″ x 1/4″ x 1/4″ NPT Female Pipe Fittings, 2 PCS 1/4″ NPT Male X 1/4″ Hose ID Brass Hose Barb Fittings
Tee with three openings for connecting and branching three pipes
Use to connect hoses and equipment or wherever a threaded barbed fitting is required
Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability

Of course you could use these fittings in lots of different applications. One possible application is a Spunding Valve build. A Spunding Valve [See: Spunding Valve Resource Post] allows you to ferment under pressure, naturally and precisely carbonate in the keg, fix over-carbonated beers and more. A similar (different manufacturer and possibly specs) fitting and barb are featured in our “Cheapest” Spunding Valve Build Option

9/26/21 4:30 PM Central: This combo is selling for just $9.98. Shipping is also free to many US addresses with Prime Membership [Try Prime for Free] or a qualifying order. Prices and availability can change quickly. Check product page for current info – More About Prices

WYNNsky Metals Brass Pipe Fitting Barstock Tee 2 PCS 1/4″ x 1/4″ x 1/4″ NPT Female Pipe 2 PCS 1/4″ NPT X 1/4″ Hose ID Brass Hose Barb Fittings – note that multiple variations of this product may be available, as such a different version may appear at this link

Also Consider:

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Make sure the components you use are compatible and rated for your intended application. Contact manufacturer with questions about suitability or a specific application. Always read and follow manufacturer directions.

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Hands on Review: Kegland BlowTie Diaphragm Spunding Valve!

A Spunding Valve allows you to maintain a set pressure. If pressure in the vessel exceeds the set point, it is expelled. It generally consists of an adjustable PRV valve, a tee, a gauge and a way to connect to your keg.

Why a Spunding Valve?

There are loads of homebrew related applications for a Spunding valve ranging from pressurized ferementation to naturally carbonating to fixing over carbonated beers and lots more. Check out our resource post on the subject. It’s arguably the go-to resource on the Internet on the subject

Update: New Kegland BlowTie v2!

Since this review was published, BlowTie v2 has been released. The major improvement is… a built in gauge. Look for an update to this review in the future. General concepts should remain the same. I recommend purchasing the newer v2.

BlowTie 2 Diaphragm Spunding Valve with Gauge FE962 via MoreBeer
Duotight Blowtie Spunding Valve with Gauge via William’s Brewing

Hands on Review Kegland BlowTie Spunding Valve

The BlowTie Spunding Valve assembly consists of the BlowTie, a DuoTight Tee Fitting, a DuoTight to flare fitting, a DuoTight pressure gauge and two small pieces of EVABarrier Tubing.

Check Prices & Availability, Review Continues Below:

v2: BlowTie 2 Diaphragm Spunding Valve with Gauge FE962 via MoreBeer
v2: Duotight Blowtie Spunding Valve with Gauge via William’s Brewing
BlowTie Diaphragm Spunding Valve Complete Kit FE961 – via MoreBeer
Kegland DuoTight Fittings and Accessories – components via William’s Brewing
Duotight Push-In Fittings & EVABarrier Double Wall Draft Tubing – at MoreBeer

Parts lists for putting this together on your own can be found toward the end of this review

The BlowTie is the heart of this build. It has DuoTight Push to Connect connections on both side as well as an adjustment knob to set pressure. Related: DuoTight Hands on Review. Continue reading →

Control Devices Adjustable Pressure Relief Valve [0 to 100 PSI] – now $11.44 + Building a Spunding Valve

Control Devices Adjustable Pressure Relief Valve, 0-100 PSI, 1/4″ Male NPT

More Info

From the product description, check product page for current description, price and availability:

Relief pressure adjustable from 0 to 100 psi
1/4″ male NPT threaded inlet connection
Brass construction and stainless steel spring for corrosion resistance
Silicon O-ring provides leak-proof seal to within 10 percent of set pressure
Micrometer-style nylon knob for pressure relief adjustment

This Control Devices CR25-100 pressure relief valve has a brass body, an adjustable relief pressure, a 1/4″ male NPT threaded inlet connection, and a fluorocarbon O-ring. The valve’s brass body, brass valve seat, and the stainless steel poppet resist corrosion and can be used in operating temperatures up to 250 degrees F. The valve can be adjusted to open between 0 and 100 psi using the micrometer-style nylon knob. This safety valve has an 6 standard cubic feet per minute (SCFM) flow rate and is suitable for low flow pressure relief applications such as in tankless air compressors.

Relief valves remove excess pressure or vacuum from a system. The valve openings allow fluids or gases to escape to decrease pressure, and then close once the valve reaches the reseating pressure limit. They also relieve excess vacuum by opening to release a gas into the system and then closing after it reaches its low-pressure limit. Some relief valves have an adjustment mechanism to set the pressure where the valve opens, making it suitable for various applications. Relief valves are rated according to the volume of liquid or gas that can flow through them and the material that the valve is constructed from must be suitable for the fluid or gas, which may be corrosive or at an extreme temperature, in which it operates. Relief valves are used in a variety of applications, such as air compressors, petrochemical and chemical manufacturing, natural gas processing, and power generation.

Control Devices manufactures valves and other flow control devices. The company, founded in 1963, is headquartered in Fenton, MO.

This valve is the heart of my Spunding Valve Build. It is a manually adjustable pressure relief valve. Adjustable from 0 to 100 PSI. I’ve found the pressure markings on this to be difficult to use/possibly inaccurate. My Spunding Build accounts for this via a pressure gauge. There is no homebrewing-related situation I’m aware of that would have you at 100 PSI. Generally you’d be at or below 30 PSI. As always, you’ll want to ensure that all components in your system (kegs, tubing, etc) are rated for your desired pressure.

What are others saying? Search this product’s Amazon reviews for “homebrew” – may include reviews for other sizes or variations

As of this posting, this is selling for $11.44. Shipping is also free to many US addresses with Prime Membership [Try Prime for Free] or a qualifying order. Prices and availability can change quickly. Check product page for current info – More About Prices

Control Devices – CR25-100 -CR25 CR Series Brass Pressure Relief Valve, 0-100 psi Adjustable Pressure Range, 1/4″ Male NPT – note that multiple variations of this product may be available, as such a different version may appear at this link

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Primefit CR1401G Replacement Air Regulator – $9.97 + Spunding Valve Build

Primefit CR1401G Replacement Air Regulator with steel-Protected Gauge, 1/4″ Npt

More Info

From the product description, check product page for current description, price and availability:

Air regulator for precisely regulating and maintaining constant air pressure
Accurate downstream air pressure regulation between 1 and 160-psi
High impact composite regulator knob and steel protected gauge
60-Scfm at 100-PSI with 1/4-inch NPT ports

A potential homebrew application for this is to use it as part of a Spunding Valve Build. A Spunding Valve allows you to ferment under pressure, naturally and precisely carbonate in the keg, fix over-carbonated beers and lots more. See: Build a Spunding Valve for more on Spunding Valves.

Most of the builds detailed in our Spunding Resource Post consist of a PRV Valve + tee + gauge + connection option. Generally four parts in total. The CR1401G replaces two parts, both the tee and gauge. See: Spunding Valve Build: Using Primefit CR1401G Replacement Air Regulator for more details

9/18/21 6 AM Central: This is selling for $9.97. Prices and availability can change quickly. Check product page for current info – More About Prices

Primefit CR1401G Replacement Air Regulator with steel-Protected Gauge, 1/4″ Npt – note that multiple variations of this product may be available, as such a different version may appear at this link

Related Resources!

Homebrew Finds is Spunding Central! Check our related resources and more detailed builds

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Spunding Valve Tips, Tricks & Troubleshooting

Why a Spunding Valve?

Spunding Valve Tips, Tricks & Troubleshooting

Check for leaks. If you’re using a version that has a QD installed in some form or fashion, you can pressurize it on a keg and then take it off. There will be a small drop when you take it off, but the pressure should remain steady after that. If it’s going down, make sure everything is tight. If you don’t have a QD… spray with Star San or soapy water until you are leak free.
I’ve found the scale on the adjustable PRV that I’ve used – Control Devices CR Series Brass Pressure Relief Valve, 0-100 psi Adjustable Pressure Range, 1/4″ Male NPT – to be largely unhelpful. This is the reason that a gauge, in my opinion, is essential.
Setting desired pressure can be tricky. See our tips for making that easy.

Got anything to add to the list? Submit a Tip and let us know!

This write-up is part of my Spunding Valve Resource Post – Jump To This Section

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Hands on Review: SPUNDit Spunding Valve

This review is by Homebrew Finds Contributor Brad Probert. Brad is an engineer, expert homebrewer and experienced reviewer. Grab a link to Brad’s website at the end of this review.

Why a Spunding Valve?

SPUNDit 2.0 Spunding Valve

Spunding valves are probably one of the most boring pieces of homebrew kit. They perform a very simple function of mechanically regulating air/gas pressure. They can be used in various ways around the home brewery to do some cool stuff when it comes to fermentation, or when dealing with kegging. The SPUNDit does all the work of a regular spunding valve but does it in a swanky package.

SPUNDit In the Box

Check Current Price & Availability, Review Continues Below:

SPUNDit 2.0 Spunding Valve – via eBay

Full Content of Kit

There are two parts to any spunding valve- an adjustment knob connected to a mechanical valve, and a pressure gauge that measures the pressure it’s regulating. The SPUNDit is a diaphragm valve type of spunding, which has better operation than a poppet type. The diaphragm valve has a larger surface area for the regulation pressure to act upon and has better pressure regulation control because its opening & closing pressures have less hysteresis. The SPUNDit has a long travel spring and fine pitch thread on the adjustment knob, allowing you to make very minute changes in the regulation pressure.

Keep Reading The Review!

Use CO2 Produced by Fermentation to Purge Serving Kegs, Carboys & Fermenters

Why a Spunding Valve?

Use CO2 Produced by Fermentation to Purge Serving Kegs, Carboys & Fermenters

This technique requires a BlowTie Spunding Valve. Since the the BlowTie has a defined output port, you can use it to capture CO2 produced by fermentation. The “out” side of the BlowTie is a DuoTight connection, just like the “in” side. Use compatible EVABarrier tubing and fittings and you can route outgoing CO2 wherever you’d like. The primary application I can think of for using this is to purge kegs, carboys and fermenters. The pictured setup shows a 10 gallon keg converted to a fermenter. The “out” side of the BlowTie is connected to the liquid out side of an empty keg. That allows incoming CO2 to purge the keg from bottom to top. The lid PRV valve for the receiving keg is open to allow pressure to vent. Of course you could tee the “out” side and flush multiple kegs or vessels using the CO2 produced by a single fermenter.

v2: BlowTie 2 Diaphragm Spunding Valve with Gauge FE962 via MoreBeer
v2: Duotight Blowtie Spunding Valve with Gauge via William’s Brewing

This write-up is part of my Spunding Valve Resource Post – Jump To This Section

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Spunding Valve Parts List

Why a Spunding Valve?

Parts List

There are many ways to configure your Spunding Valve. Our Parts List Breaks down options and gives you a run down on what parts you’ll need.

This write-up is part of my Spunding Valve Resource Post – Jump To This Section

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Tips for Setting Spunding Valve Pressure

Why a Spunding Valve?

Setting Spunding Valve Pressure

When setting desired pressure… start higher than your desiged set point and slowly work your way down. As the valve gets close to where it is going to eventually settle, it slows down the release of gas. Working your way slowly down, helps you hit your desired pressure without passing it (going too low).

Here I’m dialing in my desired pressure. Also pictured: Thermapen Mk4 [Review].

This write-up is part of my Spunding Valve Resource Post – Jump To This Section

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Build a Spunding Valve! – How and Why – Loads of Updates to The Go-To Resource on Spunding Valves!

Homebrewing Applications of a Spunding Valve

Pressurized fermentation. Ferment in a 5 or 10 gallon corny keg and use your Spunding Valve instead of an airlock. This allows you to ferment at your desired pressure.
Dry hop under pressure. This allows you to dry hop earlier while reducing oxygenation. Active yeast are more likely to metabolize oxygen that’s introduced during dry hopping during active fermentation. Since CO2 is not exiting beer as vigorously under pressure, wanted compounds, flavors and aromas are more likely to stay in your beer under pressure.
Naturally and accurately carbonate beer right in the keg.
An airlock replacement. Keep the valve wide open for non-pressurized fermentations. Only do this if you have plenty of head space. This wouldn’t make a great blow off tube.
Keg to keg transfers. Use the Spunding Valve to allow excess gas to exit the receiving keg as you transfer under pressure. Helps you achieve a slow, controlled and pressurized transfer.
Fix over-carbonated beers.
Test for keg leaks. Pressurize your keg to serving pressure. Put the Spunding Valve on (with the pressure set well above your serving PSI) and note the reading. The gauge should remain steady. If pressure drops, you know you have a keg leak. The digital build, see below, is especially helpful for this task, The digital gauge reads with .1 PSI resolution making pressure changes easy to spot. It’s worth noting that this checks the entire keg including gas body o-ring. That spot is hard to check and other way as it’s only in function when the gas QD is on. When the gas QD is on… it’s difficult to spray and check for bubbles underneath the gas QD. Thanks to Scott Janish for this tip!
As an airlock for long term aging of beers. Airlocks can run dry over time. A Spunding Valve will not.
Utilize CO2 from fermentation for flushing kegs and fermenters.

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