Vent Pipe Installation – EXCEL NE
INLET COUPLING: Place the vent inlet coupling into the hole behind the toilet seat,
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 seal using silicone caulking where the inlet coupling meets the top
of the toilet to prevent odor from escaping.
The EXCEL 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, NO MATTER
HOW SMALL.
*An optional 12volt fan may be necessary if there are competing appliances, or due
to climactic conditions. This fan is available for purchase from Sun-Mar.
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.
The vent must be installed separately from
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 the
connection between the vent and the 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 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
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