General Air Products’ newly improved OL Plus Series Oil-Less Riser Mount Fire Protection Air Compressors are specifically designed to fill dry and pre-action systems to supervisory pressure within 30 minutes per NFPA 13. All of our OL Plus single phase standard units and low pressure units are UL 1450-VDUR listed for fire protection, fully automatic, and virtually maintenance free. We include a 30” braided stainless steel flex hose and a riser mounting kit to allow for a fast and easy installation. Our standard OL Plus series units are single phase, pre-wired, adjustable up to 60 psi, and factory pre-set. Low Pressure, High Pressure, 3 phase, and 50 Hz OL Plus Series units are also available. While we do include a riser mounting kit – these compressors can be wall or floor mounted as well.