Cinderella Incinerating Toilet Installation Details - CHIMNEY INSTALL Part 1
Photo Guide to Details of Steps to Install the Cinderella Toilet

Install the Vertical Chimney Vent for the Cinderella Incinerating Toilet

The chimney vent material supplied by Cinderella uses standard 4-inch polypropylene soil and waste pipe produced by Uphonor, labeled as

UPHONOR Soil & Waste PP-MD 110x3 4 SN8 BD NPG PS102, Part No. 6414904015345 (bar coded). Our piping was date stamped as having been manufactured in 2018.

These pipe sections are assembled by simply pushing them together (if you're smart, aided with a bit of dish soap). Sections are sealed by a gasket that resides in a groove in the pipe hub.

Noticing that our pipe sections supplied by Cinderella must have been stored outdoors and exposed to the weather as the hubs were contaminated with dirt.

Out of concern that the pipe joints may not seal reliably, we removed each gasket and cleaned the gasket and the hub groove with a warm water and soap.

The cleaned hub and gasket are shown below.

Cut a Close Nipple to Join the 45 degree Elbow to the Vertical Chimney

Below is one of two 45 degree angle double hubs needed for us to construct the chimney jog around the roof overhang.

To use this double-female elbow you'll need to cut off the hub from your angled and your final vertical pipe segments.

Above: one of our two 45 degree angled elbows needed to build the outdoor jog in the Cinderella exhaust vent as must pass the roof overhang.

Because the elbow is provided with a female hub on both ends we needed to cut a short length of vent pipe to join the elbow to the upturned hub of the vertical exhaust vent pipe extending up from the bottom tee outside the building wall.

Here we cut and test fitted our 4" pipe length that permits joining two female pipe hubs. Note in the photo below that if we want 4" of additional space we make the pipe length longer than that to allow for the length of pipe that slips into each of the two hubs.

In our photo we hadn't yet used our rasp file to clean off the second pipe end edges.

Below our cleaned up pipe "nipple" cut to joint the first 45 degree angle elbow to the hub at the top of our vertical chimney section.

Below: I've put some dish soap solution on the edges of our 4" nipple to make it easier to slip it into the pipe hubs.

Below is the lower end of our first vertical chimney pipe section inserted into the upper opening of the pipe tee provided in Cinderella's installation kit.

The bottom of the tee will receive a removable cover that is taken off to permit future chimney vent cleanouts.

Below: here is the first vertical chimney vent section installed, hub-up, into the exhaust tee.

Below: this photo shows that our 4-inch nipple has been inserted into the 45 degree elbow and I'm about to insert the other end of the nipple into the upturned hub of the vertical chimney section.

Below: the elbow has been connected to the upturned hub of the vertical chimney exhaust pipe and the second of several support clamps has been snugged to the building wall.

Build the Angled Chimney Extension Around the Roof Edge

Now we are ready to insert, measure, and cut the angled length of chimney-vent to get our remaining chimney installation clear of the roof overhang.

Below: we have installed the angled run of chimney pipe and are ready to measure the cut point below that uppermost hub.

We'll cut the angled pipe to a length that gives us the desired distance from the roof edge to our final vertical chimney section.

To calculate the necessary length of our diagonal pipe length we can use the simple formula for a right triangle shown below. Remember to include in your length the amount by which the pipe will extend into the interior of the 45-degree angle hubs.

Or, by making the required measurements with the pipe already inserted into the lower 45 degree elbow in the photo above, when we measure (or calculate) the length C that is needed, we need only include the extra length of pipe that extends into the upper 45 degree elbow hub since the lower elbow already has the pipe inserted.

Just mark the upper pipe length cut location (green line in our photo).

Knowing any two lengths of a right triangle's sides A, B, and C you can calculate the length of the remaining side using the Pythagorean theorem: C² = A² + B²

If you've forgotten how to calculate a square and square root of a number you can use a calculator or an online calculating website.

Above: We chose to space our chimney around the soffit's fascia at plenty of distance to avoid damage from snow sliding off of the roof and to give room for the supporting chimney bracket.

Above: we test-assembled the angled pipe run on the ground and checked our measurements of both the total assembly length (photo above) and the straight cut pipe length with its upper hub already removed (photo below).

Note that these are the measurements we needed for the particular roof and soffit overhang dimensions shown in this article. The dimensions you'll need will almost certainly differ.

Easiest, with no calculations at all, is to simply test-assemble the pipe as we showed above on this page, then mark the cut line on the pipe as a point level with the lower edge of the roof.

Watch out: Cinderella warns about two angle options for this sloped section of chimney pipe

• If the angled section is using 30 degree elbows and slope, the total length of the angled section must not be longer than 5 ft. (1.5m)
• If the angled section is using 45 degree elbows (illustrated here), the total length of the angled section must not be more than 3 ft. 4 in. (1.0m)

Below, the straight length between hubs in our installation was 15 1/2" and the total straight length of this angled section was about 18" - well within the Cinderella's limits.

Below: our two 45 degree angle pipe hubs and straight length of chimney vent pipe between them brings the opening of the upper hub level with the lower edge of our roof, and at the distance we wanted our chimney to be spaced out horizontally from the fascia board.

In this installation the distance of the lower vertical chimney pipe from the building was set by the horizontal vent pipe that comes through the building wall and the tee attached to its end.

That put our lower vertical pipe at about the middle of the two-foot wide soffit or roof overhang.

For the upper section of our chimney to jog around and clear the soffit and then continue vertically we measured and cut the length of the angled pipe run as described above.