Installation Manual:
AdvanTex
®
AX20-RT Treatment Units
NIM-ATX-AXRT-1
Rev. 1.0, 1/10
© 2010 Orenco Systems
®
Inc.
10
Step 9: Connect Transport Line and Passive Air Vent
NOTE:
DO NOT use primer on ABS parts.
Step 9a:
Dry fit the 4-in. (100-mm) transport line and any fit-
tings between the outlet of the septic tank and the inlet on the
AX20-RT unit. Make sure that you maintain a
1
⁄
8
in. per foot
(10 mm per meter or 1%) slope from the septic tank if the septic
tank uses gravity discharge.
Step 9b:
Glue all of the transport line pieces in place.
Step 9c:
Use 2-in (50 mm) PVC pipe to plumb the passive air
vent to the 2-in. (50 mm) vent fitting that protrudes from the out-
let side of the AX20-RT unit. Be sure the vent line is sloped to
drain towards the unit and that the passive air vent is within 20 ft
(6 m) of the unit. After installation, the top of the passive air vent
should be a minimum of 3 in. (75 mm) above final grade.
Step 9d:
We recommend installing the passive air vent near a
wall or in a similar location where it is less likely to be damaged
by a lawn mower or accidental kicking, etc. You can easily hide
the air vent behind shrubbery or other landscaping and paint it if
another color is desired.
IMPORTANT:
In all cases, the line between the passive air
vent and the unit must be sloped back ¼ in. per foot (20 mm per
meter)
toward the unit. To prevent accumulation of water, do not
allow any “bellies” or low points in the vent piping. Keep the
2-in. vent piping less than 20 ft (6 m) in total length.
9a
9c
9
4-in. (100 mm)
transport line
Passive
air vent
