This spunding assembly includes everything you see in the photo (if you select Ball Lock in the dropdown)
The assembly includes the following:
Threaded 1/4" NPT Tee (304 Stainless Steel)
0-30 PSI Gauge threaded into one port.
Adjustable PRV (Pressure Relief Valve), 304 Stainless. This can be completely disassembled for cleaning.
Options for the remaining "tank connection" port:
Ball Lock or Pin Lock Gas QD, or Sanke Tailpiece (for connection to a Sanke coupler)
Note that if you select SANKE, the input to the spunding will be a tailpiece and beer nut but it does NOT include a keg coupler. If you are connecting to a conical fermenter, the 1.5" TC option would make sense.
Uses? Measuring carbonation level in a keg already carbonated (measure temp, measure constant pressure over an hour, refer to carbonation chart), Vent a keg that is naturally carbonating with priming sugar to avoid overcarbonation, pressure ferment in a corny (the true meaning of spunding).
We've had a lot of questions about how to use this device. First, please be aware that we don't
have a lot of experience using spunding for pressure ferments but here are a
few notes. You can use this device to check and/or vent a keg that has had the
gas source disconnected. If you want to just use it to check pressure, turn the
PRV all the way clockwise so that it doesn't vent and then connect to the keg's
gas post. If the pressure is higher than you wanted, turn the PRV
counterclockwise to allow venting.
In order to set the PRV pressure for venting
during fermentation, it's best to pressurize the keg first to just over your
desired vent pressure, rotate the PRV clockwise nearly all the way and then
attach the spunding valve to the keg. Rotate the knob counter-clockwise slowly
until it begins venting. Find the spot where it vents down to your desired
pressure and then stops. To check that you've set it properly, remove the
spunding, repressurize the keg to a few PSI above your set pressure and then
reattach the spunding to watch for appropriate pressure venting.
sounds tedious but gets much easier after you've done it once or twice. You can
also save gas by connecting the spunding directly to a gas source using our
ball lock jumper post.
If you don't have a CO2 source, it would be best
to start using the spunding until after fermentation has become quite active.
That way it will be building pressure while you are working on adjusting the
Warning:We recommend using a corny keg with a lid mounted
overpressure vent in ADDITION to using the spunding. It's always better to have
redundant overpressure protection when fermenting in a pressure vessel. It is safer to use an open blowoff device for the front end of a fermentation and then switch to spunding when krausen has subsided.