I have used this spunding valve on my Fermentasaurus fermenter and found it is ok. WhenI set 5 psi I need to add a washer otherwise it was not stable.

Great valve, but don't wash the spring down the drain like I did. Doesn't appear to be a replacement available.

I have used this spunding valve on my Fermentasaurus fermenter and found it is ok. WhenI set 5 psi, I need to add a washer otherwise it was not stable.

This little dude is exactly what I needed to regulate the air pressure for a homemade solar shower on my camper. Worked perfect

I use this for batch carbonating in the keg. Added a 19/32" to 1/4" plug adapter and 1/4" FIP coupler for direct connection to the gas post.I set it once to serving pressure and use when kegging with priming sugar. Carb ferm for a week, cold crash for a week and it's ready for the keezer!

Works great. wish it went to 50 psi for spunding hefeweizens!

This is the best pressure relief valve out there for the cost. Took advice from another review and put a little keg lube on the rubber seal and it seems to hold pressure very consistent. Other versions of this stick badly and do not come apart to add lube (CR series brass version). Spin top to adjust the pressure. I'm using it for my fermenter and simply boil the whole thing prior to fermentation. When close to full open (just before it unscrews completely) it holds 2-3 PSI. So far I have only tried mounting vertical.

Best low cost option for a spunding valve. At low pressures (1-4 psi) the precision is not perfect as the re-seal point is is probably +/- 1 psi but at higher pressures (> 7 psi) it is perfect. I have found that it is not critical to be exact at < 5 psi for early fermentation as long as it reseals above 0 (which it always does) to maintain positive pressure in order to avoid air entering the fermneter. In later stages for carbonation it is perfect.

If you're looking for a PRV that varies from lowish (~5psi) up to about 40psi, and you want it to reseal once it drops below your setpoint, then this is the PRV you want! All stainless constructions with only one small BUNA rubber O-ring that functions as the sealing point. Give that rubber a super light coat of keg lube and this PRV is highly capable of resealing just below the setpoint. And just to be perfectly clear, the top third unscrews from the base assembly and this is how you adjust the pressure setpoint.