Biolan Greywater Pumping Pack
Price: £823 inc. VAT | €895 inc. VAT
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The Biolan Pump Well is intended for pumping greywater into the Biolan Greywater Filter light, 70 or 125. The Pump Well can also be used as a sedimentation well or as a perforated soakaway for small amounts of untreated greywater. The Biolan submersible pump fits into the pumping well and the timer controls when the pump comes on and for how long. Biolan Pumping Package Technical Specs. Pack includes:
- Biolan Pumping Well
- Biolan Submersible pump
- Biolan Timer
Pumping well
In order to ensure the best result, it pays to assign a trained and experienced HVAC or 
earth-works contractor for the installation work.
Installation notes
The Pump Well (biolan-well-dwg) is installed in an upright position on an even and compacted bed (at least 150 mm thick) of gravel, crushed stone or sand. The installation depth is determined according to the elevation of the sewer coming from the property. While installing gravity flow drainage, a sufficient gradient (of at least 1-1,5 %) needs to be provided to allow the wastewater to flow without obstruction from the sewer outlet of the house all the way to the Pump Well.The maximum depth of the Pump Well from the inlet connector to the ground surface is about 750 mm. As necessary, the neck-part of the well can be shortened by at maximum 700 mm. The backfill soil of the excavation must be non-susceptible to frost, for example sand. The backfill must not contain large or sharp stones. The backfill shall be compacted after each layer of about 300 mm.
| Technical information | |
| overall height | 1450 mm |
| height of the tank | 500 mm |
| diameter of the container | 650 mm |
| the diameter of the riser pipe | 250 mm |
| volume | 150 l |
| the inlet connection | 75 mm, 110 mm |
| septic tank outlet connection | 75 mm, 110 mm |
| outlet connection for pressure sewer | 32 mm |
| weight | approx. 15 kg |
| max. immersion depth | approx. 1400 mm |
Anchoring
The Pump Well must be anchored, if buoyancy may occur resulting from the presence of groundwater. The bottom of the Pump Well is fitted with brackets for anchoring. The well can be anchored, for example, using 1-m-long ribbed reinforcement bars (rebar 15 mm in diameter). If the buoyancy caused by the groundwater is strong, a concrete slab or pre-fabricated anchoring slabs (for example) should be used for anchoring. Consult your engineer if in doubt.
Connecting the Incoming Pipe
The inlet connector is 75 mm in diameter, but it is also possible to connect a pipe 110 mm in diameter to it. Use a connecting sleeve with gasket for connection.
Laying the Outgoing Pipe
The pressure sewer is piped through the cover of the Pump Well into the Biolan Greywater Filter. The position of the lead-through for the pipe and the electric conductor, which shall be opened by sawing, is marked in the cover on the well. A fabric-reinforced hose with smooth surface and 32 mm in diameter is used as pressure sewer pipe.
Ground Frost Insulation
Where a Pump Well is used in winter, it should be insulated using, for example, slabs of expanded polystyrene, if the covering depth of the well is less than 750 mm. It is also recommended that a slab of insulation be installed under the well cover for use in winter.
Submersible Pump
Installing the pump in the well – The pump is placed at the bottom of the well. The bulge in 
the cover of the well shall be cut off to make an opening for the pressure pipe leaving pump and the electric cable. The pump is lowered to the bottom of the well and lifted for maintenance using the cord fixed to it.
Connecting the Biolan Submersible Pump to the Filter – Connect the 32mm smooth surface fabric-reinforced hose to the Submersible Pump and tighten with a hose clamp. A reduction sleeve is needed for connecting the hose coming from the pump to the Greywater Filter. reducing 75 mm to 32 mm (HVAC-number 2480 104).
Technical information | |
yield | 130 l / min |
maximum head | 5 m |
power take-off | 350 W |
| maximum submersion depth | 7 m |
hose outputs | 25, 32 and 36 mm |
IP rating | IP 68 |
weight | 2.9 kg |
Maintenance of the Biolan Submersible Pump
The Pump Well must be emptied and the Submersible Pump serviced at least once a year. Lift the pump up from the well. Open the suction chamber of the pump and clean out possible hair, grease or debris. Check the connection of the hose to the pump. If the greywater filter is not used in winter, lift the pump up from the Pump Well in the autumn.
The Timer
The Biolan Timer ensures that wastewater is pumped into the Greywater Filter in suitable quantities. The Timer is connected between the submersible pump and the power source. 
Splash-proof rating of the Timer housing is IP54, which means it is splash-proof.
Setting the Timer
The flow of the pump must be measured after it’s installation, before setting the timer.The pumping time shall be set to so that each batch of water delivered to the filter is about 20 litres and the filter boxes do not run over; generally between 10-30 seconds. The pause time shall be set so that the uppermost filter boxes will be able to absorb the water from the previous operating period before the next pumping period starts. A recommendable pause time is 10-20 minutes. A break of at least 5 minutes is required.
Maintenance
Check the operation of the Timer once a year by observing the pump on duration and the pump off duration. As necessary, adjust the pumping time as per above.