Question about spunding

Mastoras007 · Jul 5, 2026

Hello
I have those spunding valves and I'm not sure if works
I give on unitank some pressure but I didn't see any bubbles,
There is not fermentation is just water
On first photo I have set 0,2bar but no bubbles
Second photo I have remove the mechanism and still nothing
Any help?

Bigbre04 · Jul 6, 2026

those are spuning valves.

do you have another gauge where you can confirm your pressures? also very important to be VERY gentle with pressure gauges as they are sensitive.

I would set the spunding valve to roughly 10 psi(dont know the bar). add an additional gauge onto another port(doesnt matter which one) and the bring the pressure up until all of the gauges read 10 psi.

You can then loosen the spunding valve until it starts to bleed gas. If you need to mark the spunding valve do so. They could be off from the factory.

I have also noticed that mine will "sit" at a few psi below where they "blow". I technically tighten mine past 10 psi in order to keep them at 10 psi of head pressure. they may blow at 10 psi but the actual pressure drops down to 8 while they blow off.

many gauges dont do very well at lower pressures.

Next time that you buy gauges pay close attention to the ranges that you expect to be working at. for a tank that would fail far before 60psi(where your gauges max out) you wouldnt want a gauge that high. for my tanks i use 1-30psi gauges. It makes the gauge alot easier to read and more accurate.

you should also confirm that ALL of your gauges read the same and accurately.

Bigbre04 · Jul 6, 2026

if you are running the spunding valve at 10 and 15 psi you should go through and mark them. do it with a marker or tape or something until you get your settings dialed in. it will save you time in the future.