Vent Pipe Installation – CENTREX 3000 NE
INLET COUPLING: Place the vent inlet coupling into the hole on the top of the
CEMTREX 3000 NE, so that the 1” of smaller diameter pipe is inserted into the hole
on the top of the toilet. This is the first piece of the venting. Once you have finished
assembling the vent, you should run a bead of silicone around where the inlet
coupling meets the top of the toilet to prevent odor from escaping.
The CENTREX 3000 NE does not have a built-in fan and operates with passive
venting. Due to this, bends in the vent stack must be limited to no more than two 45°
bends. All additional vent pipes should only be vertically installed. THERE CAN BE
NO HORIZONTAL, FLAT OR DOWNWARD SECTIONS OF VENT.
INSTALL VENT SO THAT IT TERMINATES 24” - 30” ABOVE THE HIGHEST
PEAK OF THE ROOF. If there is more than 30” of vent, including diffusor, needed
above the roof line to reach 24-30” above the highest peak of the roof, use guy wires
to secure the vent above the roof.
The vent must be installed separately from ALL other household vents. Venting
cannot be merged with 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
connections closest to the toilet, and PVC glue to seal any others
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.
Diffusor Installation
The diffusor provided with the toilet is a simple device to be
installed at the top of the vent stack with the larger pipe
protruding above the smaller. To install, simply glue the diffusor
vertically on the topmost section of vent pipe. The diffusor
design encourages updraft, and discourages wind and weather
from going down the vent stack. We do not recommend
installing anything else on the top of the vent as it could impede
the venting. Unlike wind turbines, diffusors are less likely to
freeze in winter, and are more effective in calm weather.
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