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❑ Step 11: In most cases, the Fuji Clean treatment system will vent through the building's septic influent <br />line and building plumbing. In cases where there is an influent pump, or in severe downdraft <br />locations, a separate vent should be considered. If you do choose to install a vent, be sure that the <br />vent slopes toward the tank so that any moisture accumulation drips back down toward the tank. <br />If optional air vent line is installed, <br />slope conduit toward tank to <br />prevent moisture accumulation <br />3" port for optional air vent line. If not used, <br />install plug in port by turning clockwise to tighten. <br />(Note: 2 ports in CE21, 30, CEN14 and 21). <br />Vent pipe diameter <br />M` d <br />r z. <br />Commercial 3" ((�75) 4" ( 100) <br />One vent line is able to connect system clusters of <br />2 to 4 units with 4" diameter pipe. <br />Joining point of tank and vent line within 16feet. <br />In case of over 5 units, use two (2) vent lines. <br />❑ Step 12: During final landscaping, seeding <br />etc., be sure to pitch final grade away from <br />covers to sweep surface water away from <br />treatment tank. <br />• Local regulations may specify required vent pipe <br />diameter <br />• Keep horizontal vent pipe as short as possible. <br />Vertical pipe length should be 2 times longer than <br />horizontal <br />• Installation of a positive flow ventilation fan <br />facilitates better ventilation <br />• Greater temperature differential between tank and <br />outside air facilitates more effective ventilation <br />❑ Step 13: Fill out Warranty Activation Card (received with this Installation Manual) and return to <br />Fuji Clean USA to activate system Warranty. If this card cannot be found, please contact Fuji <br />Clean USA for voice or online Warranty activation. 207-406-2927. <br />