Air Pressure Reducer - 90 PSI The ESCO Inline Preset Air Pressure Reducer was designed for application on hydraulic and air-powered tools to permit the controlled, safe flow of air by regulating the pressure to two designated settings: 90 or 110 PSI. The Inline Preset Air Regulator is a simple, affordable solution to reduce tool downtime and ensure long-life for your air or hydraulic shop equipment.. Extends air tool life. Maintain recommended working air pressure. Easy Installation & Usage. Can be used on any air tool rated for 90 psi recommended working air pressure. Lightweight Aluminum Construction - Anodized for corrosion protection. Tamper-Proof - Locked in preset regulated air pressure prevents air pressure changes. No Pressure Gauge Needed - Air regulated to recommended pressure every time 10609 No -