Specifications and setup guidance for blowers and air pumps used in septic and wastewater systems. Use the information below to understand proper sizing, installation, and operation to ensure reliable performance and long system life. HiBlow Duo Blower HiBlow Duo Blower Duo.instructions.NuWater Notations Hi-Blow USA, Manual for DUO Models Hi-Blow USA. DUO Models Timer Instructions HiBlow Published-Duo-Start-Guide-US-Customers HiBlow HP-Dual Port HiBlow HP-Dual Port Hiblow-HP Series manual HP-60-80_170308 HP-manual-with-slide-switch Thomas EP-Dual Port Thomas EP-Dual Port Performance curve Thomas. EP60GDS. EP80GDS. Thomas. EP Dual Port Timer Setting Procedure Thomas.Timer Setting Procedure