https://www.ebay.com/sch/i.html?_nkw=Allegro+Ambient+Air+Pump&_sacat=0&_dmd=2

Allegro Ambient Air Pump

Regular price
$916.00
Sale price
$676.00

Ambient Air Pump, Couplers 3/8 In. OBAC, 3/4 HP, Voltage 115, Amps 9.05 AC, CFM 0 to 10, Pressure 0 to 15 psi, Max. Number of Respirators 2, Max. Number of Hoods 1, For Use With Constant Flow Respirators, Features Works Well In A Variety of Work Environments Including Painting or Refinishing Booths, for (2) Respirators or (1) Hood, Includes Inlet and HEPA Inline Filters, Adjustable Pressure Relief Valve, Pressure Gauge, Slip Resistant Rubber Feet, Electric Cord