The BlowTie is a diaphragm based adjustable spunding valve used to release pressure from kegs and other pressure vessels. It features a usable range of 4 to 15 PSI, and the diaphragm construction means it has a wider pressure range than spring based spundling valves. This unit can be easily disassembled for cleaning using a phillips head screw driver. Accuracy of the gauge is plus or minus 2 PSI.
Instructions: 1. Cut good quality tube (such as EVABarrier 5mm ID x 8mm OD tubing, item Z91) cleanly with tube cutter making sure the end of the tube is a clean cut.
2. Push one end of the tube to the inlet side of the BlowTie (look at the direction of the arrow) and the other end to your pressure vessel that is releasing gas.
3. Use the yellow adjustment knob to control the pressure coming out of the pressure vessel. Clockwise is higher pressure and anticlockwise is lower pressure.
Here is a good cleaning video in case your valve ever gets clogged:
Here is a video on cleaning the BlowTie when it gets dirty with Krausen:
Dec 10, 2022 by Chris
Q: Can you swap the pressure gauge and use a 30 psi/2 bar gauge?
A: A 30 PSI gauge will fit if you want to purchase it separately, however, the Spundling Valve is really only rated at 15 PSI, and will may not be reliable at higher pressures.
Aug 23, 2021 by LP
Q: Hello! can this be used as a regulator? I pressure transfer my batches and would like to have something that can dial down to 4PSI or so without having to disconnect the rest of my setup. Would this be able to do that?
A: No, this can only be used as a pressure release valve.
Aug 26, 2020 by Aaron Malburg
Q: Is this supposed to come with the tubing that's needed? I bought one a few months ago that didn't come with it.
A: No, this is just the valve with gauge. Our item C70 joins this to a item Z93.
Didn't work for me
I found that the Spunding Valve did not work in the sense that turning the valve stem did absolutely nothing. Given my experience, I wouldn't recommend it. I would return it if I could but I suspect the return time has passed. William's Brewing Responds: We have a one year warranty on everything we sell. It sounds like you got a defective valve, we will ship a replacement out at no charge.
Great little guy
I'm embarrassed to say that after 30 years of brewing beer I didn't know what a spunding valve was. I have a seven corny keg operation and have often had problems with pressure build up in my three aging kegs. It is difficult to vent off the right amount of pressure for serving from the tap. I came across this Duotight Blowtie Spunding Valve with Gauge, read the reviews and bought one. I hooked it up to a four way hose barb and can connect to three kegs if needed to even out and adjust pressure. I no longer have that over-gassed problem. Unless I eat too much sauerkraut. Great product, although it looks like a plastic toy it does the trick. Highly recommend it! Avoid those embarrassing gas problems.
Leaking Hard to Find
I have only used this once on my Fermzilla Conical Fermenter. For the first 10 days of fermentation, the blow tie valve worked great at keeping the pressure set at 12psi. Then suddenly I noticed pressure dropping to about 7psi. Can't seem to locate where the drop came from. Adjusting the pressure is sensitive. Be cautious when adjusting dial. To check for accuracy, you can put on the gas line from your keg system to match what is on this gauge. William's Responds: If you put it on a spare keg and pressurize the keg to 15 PSI, then turn it over and submerge the valve in a tub of water. Bubbles will indicate where the leak is. If the unit is leaking, contact email@example.com for warranty service.
I did not buy my BlowTie from Williams Brewing, but I would just like to add my 2c for anyone looking at buying this. I've had great success with this little guy. My current config is: I brew 10g batches at a time. I split wort evenly with 2 corny kegs, add my yeast, close up the kegs, and then attach the gas outposts to some duotight plugs. Those both go into a T connector, which then feed into the BlowTie. This allows me to pressure ferment both my kegs at once without having to fuss with airlocks, and worry about losing liquid during extended aging. During fermentation, I use the output of the blowtie to purge at least one keg (sometimes 2 if I have laying around) with C02 generated during fermentation. This allows me to pressure transfer into a purged keg when I'm ready.
impossible to get it to the pressure you want
I try my best for hour to lower the pressure from my regulator to my keg, can't do it, doesn't matter how small of an increment I try, it goes from zero to 10+ psi, a lot of time as pressure got up I turn the dial clockwise to reduce the pressure it actually goes up higher. very disappointed, even more so because I have to return it. William's Brewing Responds: No need to return this, you received a defective product, and we are shipping out a replacement no charge.