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5

Option B – ventilation through the roof

Priot to mounting the Installation Kit and Connection

Kit are needed;  these can be purchased from the

place where the toilet was purchased. To install the

ventilation pipe, loosen the two through screws 

holding the fan motor in place. Then install it using

the two extra screws that are in the lower section,

under the fan motor. Place the connecting piece on

the fan cover.

Lift off the upper section (1) of the toilet, remove 

the inner container (9).

Drill or cut a hole in the lower section for the 

urine hose, according to 

chosen option (7A or 7B).

Position the lower section 

(10) against the external 

wall of the room.

Mark for wall brackets, 

ventilation pipe and hose.

Measure and drill a hole in 

the roof for the ventilation 

pipe, 55 mm. Saw a hole for 

the urine hose (25 mm).

Pass the urine hose 

through the floor/wall 

and seal with silicone.

Set the lower section in position and seal between 

the floor and the toilet. Connect the urine hose to

the urine bowl. Fix the hose using hose clamps, 

being careful not to damage the nipple.

Mount the ventilation pipes unsleeved end into the 

rubber coupling. Screw the toilet securely to the 

wall using screws and washers.

Install the ventilation pipe and seal the passage 

through the exterior roof using asphalt sealant to 

prevent leaks.

Insulate all piping that passes through cold spaces 

(e.g. in the loft and on the outside of the building) 

– this is to prevent condensation.

Cut the exterior pipe to fit the angle of the roof.

Position the roof flashing – use soapy water to 

make this easier. For those with a tin roof, it may 

be best to get a metal worked to make some 

metal flashing.

Place the outer pipe with the roof flashing over 

the insulated ventilation pipe.

Adjust the roof flashing to the external roof and 

seal firmly with asphalt sealant between the 

flashing and the roof.

Once all the piping is insulated and covered, fit 

the reducing coupling on the top, and then fit the 

insect netting.

Place a bag in the composting chamber and fold it 

over the edge. Place the container inside the lower

section and check that the metal railing covers the 

edge of the urine bowl and that the bag does not 

cover the fan. The bag is tightened in the front by 

the metal railing and in the back by the handle.

Pour approximately 5 litres of Special humus into 

the toilet.

Plug into an earthed socket.

IMPORTANT! Insulate the pipe according to the 

instructions. Do not use pipe bends over 45 degrees

and avoid having more that two; this is to ensure a 

natural draught when the toilet is not in use.

FAN

pre-mounted 
screws

fix the cover 
using screws 
and nuts

Attachment 
Option B 

(from above)

W
A
L

spacers

pip

Use no more than 2 pipe bends, and none over 45° angle, to ensure a natural draught.

MAX 45

°

B2

B1

non-
sleeved

sleeved
pipe

RUBBER 
FLASHING

sealing using asphalt sealant

roof covering (tile,
felting or tin/plastic)

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