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Klargester BioTec 3 - P18 (up to 18 people)

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Get an exclusive 2 year extended warranty on your Klargester BioTec only with Direct Drainage.


Current Leadtime 5 Working Days


Product Information 


For domestic dwellings without access to mains drainage, the Klargester BioTec P18 provides quality, reliability and peace of mind and is one of the most popular systems from this leading UK manufacturer.


The Klargester BioTec P18 comes with efficient air blower, control panel, loss of pressure/pump alarm and free UK delivery with optional HI-AB offloading.


 Klargester BioTec P6 - P18 Installation Guide

 Klargester BioTec Data Sheet

 Klargester BioTec P18 IPS Outlet Technical Drawing 

 Klargester BioTec P18 Gravity Technical Drawing

 Klargester BioTec Certificate of Conformance 



Model Number:  BioTec P18
Max. Number of Full-Time Residents: 18
BOD Load (kg/day): 1.1
Weight when Empty (kg): 445
Outside Diameter (mm): 2700
Depth (mm): 2600
Standard Inlet Invert (m)*: 1.0
Inlet Invert to Base (m): 1.6
Outlet Invert Gravity Systems (m)**: 1.1
Motor Rating (watts): 150
Drainage Connections (mm): 110


*There are two depths of inlet in the range 1.0m and 1.5m.

**0.605m on IPS models.
Under normal domestic conditions a discharge of 20mg/l BOD, 30mg/l SS and 20mg/l ammonia can be achieved.


Klargester BioTec 3 - P18 - Sizing Your System

Browse the alternative sizes of Klargester BioDisc sewage treatment systems available via the links below:


BioTec 1 - P6 (up to 6 population)

BioTec P9 (up to 9 population)

BioTec 2 - P12 (up to 12 population)

BioTec 3 - P18 (up to 18 population)

BioTec 4 - P25 (up to 25 population)


How the Klargester BioTec 3 - P18 works

The Klargester BioTec sewage treatment plant uses the well-proven aerobic biological process. Treatment is a three-stage process:

    1. Coarse solids are filtered and retained for gradual breakdown
    2. The resulting liquid is continuously distributed over a plastic suspended filter by an integral lift, powered by a remotely sited blower
    3. The solids are allowed to settle and under normal domestic conditions, treated water of 20mg/l BOD, 30mg/l S.S., 20mg/l Ammonia can be achieved

Features of the Klargester BioTec 3 - P18

The BioTec sewage treatment plant range is fully compliant, tested and approved to BS EN 12566 Part 3 and is CE marked to meet with the latest Construction Products Regulations July 2013. The BioTec is one of the products that pioneered package treatment plant technology and remains one of the most popular sewage treatment plant in the UK & Ireland.


It is ideal for locations where discharge is to sub-surface irrigation, or to a suitable watercourse (where approved by the Regulator), and where a septic tank will not meet the required standards.

    • Includes Loss of Pressure or Pump Alarm as standard to alert you when the compressor is not working

    • Manufactured from robust GRP

    • No mechanical or electrical components within the plant - low running and maintenance costs

    • Comes with a multifunctional control panel for monitoring the system - performance is future proofed along with any necessary upgrades

    • Externally-mounted blower for simple maintenance, no entry required into the plant

    • Invert level options of 1m or 1.5m making the ideal solution for replacement failing septic tanks, as they are compatible with existing drain depths

    • Low-level visibility pedestrian duty cover - safe for children and pets

    • Suitable for concrete backfill

    • Recommended installation to be located 7m from a habitable building, 10m from a watercourse or 50m from a borehole or well

    • Treats sewage using a traditional elevated filter, a well-established and proven method in a complete packaged solution

    • Ensures compliance with effluent quality

    • Available with a 5-year extended warranty and service plans for continued system care

    • Parts and spares available - please contact us for more details

Contact Direct Drainage for more information on the BioTec range, or visit the Kingspan website

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