Vent Pipe Installation – CENTREX 3000
If running a vent through a wall, it should only be done at a 45° angle to prevent condensation from accumulating
in the pipe, causing a constriction. Venting should only be installed vertically. Limit bends in the vent stack to no
more than four that have a combined total of 180°. Use silicone to seal all vent connections. DO NOT INSTALL
WITH HORIZONTAL, FLAT OR DOWNWARD SECTIONS OF VENT.
All vent pipe that is exposed to the outside or in a non-heated space should be insulated if using the unit during
cold weather.
INSTALL VENT SO THAT IT TERMINATES 24” - 30” ABOVE HIGHEST PEAK OF THE ROOF. If there is more
than 30” of vent, including diffusor, needed above the roof line, use guy wires to secure the vent above the roof.
A 4” diffuser is included with the CENTREX 3000. This is meant to be installed at the top of the vent stack to
encourage updraft. (See page 8 for installation instructions)
The vent must be installed separately from ALL other household vents. Venting cannot be merged with other,
pre-existing venting. Doing so will prevent the toilet from operating odorlessly.
All connections in the vent pipe should be sealed. Use silicone caulking to seal the connection between the vent
and the composting toilet. A sealant such as PVC cement may be used for all other vent connections.
The vent stack should end approximately 24” - 30” above the peak of the roof to
allow for proper ventilation of odor, and to encourage updraft. Where the pipe is
taken through the roof, a roof flashing may be required if running the vent stack
through the roof. If you have a steeply pitched roof, or are in an area where
snow shear is a danger, you may wish to install a heavier pipe around the vent
pipe where it exits from the roof. If you do choose to install in such a manner,
ensure that the area between the pipes is sealed with a waterproof substance to
prevent leaks.
The collection chamber is included with your Centrex 3000, to facilitate the auto-feed
function of your unit. The collection chamber can be lined with the enclosed chamber bin
liner, and placed around the opening, on the handle side of the unit. This will allow
compost to exit directly into the collection chamber, when finished.
Replacement collection chamber bin liners can be purchased directly through Sun-Mar.
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