(Ordered with Biotube Pump Vault) Orenco's High Head Effluent Pumps are manufactured specifically for wastewater applications, to transport filtered effluent from septic tanks or separate dosing chambers. High head capabilities make them the ideal choice for STEP effluent sewer systems. Steep pump curves provide high-pressure capacity to clear plugged orifices in pressurized distribution systems. Orenco's High Head Effluent Pumps possess a high cycling capability (up to 300 cycles/day) that is needed for optimum treatment in many of today's high performance onsite systems. All pumps are UL and/or CSA listed for use in effluent and are backed with an optional 5-year extended warranty. (5-year warranty comes standard with PF pumps.)