The Biolan Simplett Plus dry toilet can be installed
directly on a floor surface and is suited for both indoor
and outdoor use. The functioning of the Simplett Plus is
based on the separation of liquid and solid waste in the
seat part. No water or power supply is required.
Contents
Component list 4
1. PLANNING AND INSTALLATION 5
1.1 Technical specifications 5
1.2 Year-round use of the dry toilet 5
1.3 Ventilation 6
1.4 Liquid removal 6
2. SIMPLETT PLUS USE AND MAINTENANCE 7
2.1 Using the bulking agent 7
2.2 Unloading the receptacle 7
2.3 Emptying the liquid tank 8
2.4 Composting solid waste 8
2.5 Cleaning 8
3. TROUBLESHOOTING 8
3.1 Odour 8
3.2 Insects and their larvae 8
Warranty 8
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Component list
PartItemPart number Material
1Dispenser knob-PE
2Dispenser axle-RST
3Dispenser plate -PE
4Bulking material container lid-PE
5Latches-RST
6Bulking material container-PE
7Container’s hinges-RST
8Pehvakka thermal seat70578500 PPE
9Hinge pin, 2pcs18726240 PE
10Toilet tank lid-PE
11Horizontal ventilation pipe28704055 PP or PVC
12Receptacle18703050 PP
13Lead-through rubber 75/8318001001 EPDM
14Liquid funnel18703180 PE
15Liquid funnel fixing21570210 RST
16Toilet tank17703070 PE
17Flexible liquid pipe28578010 PE
18Logo plate21570210 RST
Includes in addition to the parts shown in the detail:
Ventilation pipe cap, Ø 75mm40580007 PE
Instructions for use27703150 PAPER
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(EN) INSTRUCTIONS FOR USE
1. PLANNING AND INSTALLATION
Install Biolan Simplett Plus horizontally on a floor surface. When
selecting the location, consider the organisation of the ventilation and liquid removal and leave enough space for use and maintenance. The device should be placed so that the ventilation pipe
is easy to bring outside. Leave enough room between the device
and the wall to make unloading of the device easier.
The device is delivered with the bulking material container turned
downward. Lift the container and lock the latches (Figure 1).
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1.1 Technical specifications
• depth 680mm
• width 530mm
• seat height 465mm
• height 1,020mm
• weight 10kg
• receptacle volume 28litres
• outer diameter of the drain pipe 32mm
• length of the drain pipe 335–935mm
1.2 Year-round use of the dry toilet
When installed in a heated space, you can use the Simplett Plus
device all year round. In this case, ventilation and liquid removal
must be thermally insulated in cold sections, and the drain pipe
has to have a sufficient tilt to prevent liquid from freezing in the
pipe. If liquid is collected in a canister, it has to be emptied in autumn to prevent the canister from breaking if it freezes. A dry
toilet installed in a non-heated space can be occasionally used
during winter. Simplett Plus is manufactured from cold-resistant
materials that will not get damaged in freezing temperatures.
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1.3 Ventilation
Installing the horizontal ventilation pipe
Install the horizontal ventilation pipe (part 11) in the device. Ensure that the pipe end comes on top of the receptacle so that
possible condensate drains in the receptacle (see Figure 3).
Ventilation pipe through the back wall
Install the ventilation pipe through the back wall (Figure 4). Drill a
lead-through of at least Ø 75mm on the back wall for the horizontal ventilation pipe (part 11) according to the dimensioned drawing (Figure 2). The hole drilled in the wall must be a little higher
than the hole in the device to ensure the condensate does not
remain stagnant in the pipe. Cut the horizontal ventilation pipe to
the correct length so that the bend used connects to the vertical
ventilation pipe with as gentle curve as possible. Ensure that the
pipe is positioned inside the dry toilet as shown in Figure 3.
The horizontal ventilation pipe is extended with a sewer pipe of
Ø 75mm until it reaches above the roof ridge. Biolan Ventilation
Tube Package has been specifically designed for this purpose,
and it is available as an accessory. Suitable pipe is also available
at specialised HVAC shops and well-stocked hardware shops. It
is recommended that a rounded bend is used. Additional curves
in the ventilation pipe disrupt natural ventilation and can cause
unwanted odours. Ventilation can be further improved by using
Biolan Wind Fan.
Figure 3
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Ventilation pipe in the toilet space
The ventilation pipe can be routed from the toilet to the roof
according to the instructions given above (Figure 5). The leadthrough to the roof can be sealed with a specific roof leadthrough set. Hardware shops sell lead-throughs as accessories.
1.4 Liquid removal
Installing the liquid funnel and the liquid pipe
Attach the liquid funnel (part 14) to the liquid pipe (part 17),
and install the funnel in the bracket (part 15) inside the device.
Route the liquid pipe around the receptacle through the hole on
the back of the device. The pipe is flexible, and its length can be
adjusted by pulling both ends. If the site does not include sewerage, make a hole of at least Ø 43mm for the liquid removal pipe
(part 17) on the back wall or the floor (Figure 5).
Draining liquid
The liquid pipe must be led to a closed canister, container or sewage system. In dimensioning the liquid tank and selecting its location, consider the fact that the volume of urine excreted daily
is approximately 1–1.5litres per person. Ensure a sufficient tilt
when installing the liquid pipe so that liquid will flow naturally
downwards. This means that the hole made in the wall must be
lower than the hole in the device (2–3cm/m). The canister can be
placed on its side or buried in the ground. Sewer pipe parts of Ø
32mm are also suitable for extending the liquid pipe. It is recommended that you use a sleeve in the joints.
Figure 4
Figure 5
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Nutrient-rich liquids cannot be discharged
directly into the ground because they cause
excessive point-source nutrient loading.
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For more information on regulations concerning
composting, contact your local waste advisor.
More information on composting and using urine can
be found at www.biolan.com.
2. SIMPLETT PLUS USE AND MAINTENANCE
The Simplett Plus dry toilet is always used while sitting to ensure separation of solid matter and liquid.
When using the toilet for the first few times, it is recommended
that you pay attention to a correct sitting position so that the
urine is directed to the right place.
Remember to guide your guests in how to use the toilet.
In addition to toilet waste, you can throw toilet paper and com-
postable sanitary wipes in your Simplett Plus dry toilet.
Do not throw the following in the toilet:
• sanitary towels, trash
• chemicals, lime
• detergents, washing water
• ash, cigarette ends, matches
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2.1 Using the bulking agent
Using a suitable bulking agent is crucial for the proper functioning of the toilet. The recommended bulking agent is Biolan Toilet
Bulking Material. Before use, place a couple of centimetres of the
bulking agent on the bottom of the receptacle (part 12). Fill the
bulking agent container (part 6) with bulking agent (Figure 6).
Add more bulking agent only after “number two” by pressing the
dispenser knob (Figure 7).
2.2 Unloading the receptacle
When the receptacle in the toilet is full, it is unloaded in the composter. Open the locks behind the bulking agent container and
turn the container on top of the seat (Figure 8). Open the container lid (Figure 9). Lift up the receptacle from the device and
unload it (Figure 10).
Place the unloaded receptacle back inside the device, close the
lid, lift the bulking agent container up, and lock the latches. If you
use a biodegradable bag inside the container, place the contents
and the bag separately in the composter to make the composting
process more efficient. You can also place a piece of newspaper
on the bottom of the receptacle under the bulking agent.
Figure 6
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Figure 7
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Figure 8Figure 9Figure 10
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2.3 Emptying the liquid tank
Empty the liquid tank when required, but always before winter to
prevent the tank from breaking when it freezes. Urine contains a
lot of nutrients, especially nitrogen. It can be used right away as a
fertiliser in the garden by diluting it with water in a ratio of 1:5 or
as such after letting it stand for three months.
2.4 Composting solid waste
For hygienic reasons, all solid waste unloaded from the Simplett
Plus dry toilet has to be composted before using it in the garden:
at least for a year before using it as a fertiliser for edible plants
and about six months before using it for ornamental plants. You
can compost toilet waste as such or with garden or household
waste. Consider local rules and regulations for waste management and sufficient safety distances to neighbours, wells and
waterways. Burying waste in the ground is prohibited. Composting toilet waste always requires a closed composter equipped
with a lid. Compost waste in accordance with local instructions.
2.5 Cleaning
All parts of the Simplett Plus dry toilet can be cleaned using general household detergents. The toilet lid can be removed from
the body. When you disconnect the device from its drain pipes
and ventilation pipes, you can move the device outside. Wash
the liquid bowl and funnel (parts 10 and 14) of the lid and flush
the liquid pipe (part 17) with warm water and mild detergent
or washing soda at least once a year to remove the sediment
formed by urine.
Warranty
The Biolan Simplett Plus dry toilet has a one-year warranty.
1. The warranty is valid from the date of purchase and covers
possible defects in material and workmanship. The warranty
does not cover any indirect damage.
2. Biolan Oy reserves the right to either repair or replace damaged parts at its discretion.
3. Any damage resulting from careless or forcible handling of
the device, failure to observe the operating instructions, or
normal wear and tear are not covered by this warranty.
In warranty-related matters, please consult Biolan Oy directly.
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3. TROUBLESHOOTING
3.1 Odour
If unwanted odour occurs, check that there is no liquid on the
bottom of the device under the receptacle. If there is liquid on
the bottom, check the joints of the liquid pipe and wash the inner parts of the device if required (see section 2.5). You can also
prevent odour issues by pouring a little bit of water into the liquid
funnel after each use. Remember to cover the waste with a sufficient amount of bulking agent.
3.2 Insects and their larvae
If there are flies or similar in the toilet, unload and wash the receptacle and check the cleanliness of the body section (see section 2.5). Destroy the insects flying in the toilet with a sprayable
pyrethrin-based insecticide. Contact your seller for advice on
how to select a suitable product. Also ensure that ventilation is
sufficient and that the bulking agent has been used appropriately.
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Biolan Oy
P.O. Box 2, 27501 Kauttua, FINLAND
www.biolan.com
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