Relieves pressure while filtering from one keg to another plus allowing reading the pressure in the receiving keg. Can also be used on a fermenter as a spunding valve to relieve pressure at a psi level between 0-15psi.
Notes: The very end of the pressure relief valve can be adjusted by unscrewing to adjust the pressure. If tight, and not adjustable by hand, it needs to be loosened with pliers. Wrap a towel around the end piece of the pressure relief valve (about the last 1/4 in) and loosen with pliers. Then finger tighten or loosen to desired pressure.
Gauge reads 0 - 15 psi