3/4" Air Compressor Regulator & Filter Combo w/ Gauge & Automatic Float Drain3 4" Air Compressor Regulator & Filter Combo w Gauge & Auto Drain Brand new 3 4" compressed air pressure regulator & filter combination with gauge and free wall mounting bracket. This regulator and filter combo which has a max pressure of 250 psi and will regulate your air pressure anywhere from 7 psi up to 225 psi. The adjustable turn knob can be pulled out to unlock and adjust the pressure and once it is set you can press in on the knob and it will