Specialists in septic tank and sewage treatment installations IN Dorset, Hampshire, Wiltshire, Somerset

Is Your Septic Tank Or Soakaway Not Working Properly?

No Mains Sewage In The Vicinity? We can help!


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Sewage Treatment

We supply and fit several different sewage treatment systems. All are afforable products with low running costs…

Mantair Septic Tanks

We supply and fit the Mantair range of septic tank systems and sewage treatment plants…

Soak Away

The Polybed Drainage System is a sustainable high-performance alternative to traditional methods…

Rain Water Harvesting

Rainwater Harvesting is a simple solution which supports the environment, assists with water shortages and helps to satisfy the increasing demand for water…


Where there is no access to a mains sewer, the Matrix plant provides an extremely efficient solution to sewage disposal…


Read recent comments and see ratings by our customers on checkatrade.com. Totally genuine feedback…

Welcome to Drainability

We are specialists in septic tank and sewage treatment installations in Dorset, Hampshire, Wiltshire, and Somerset.

We are The South’s Premier Suppliers and Installers Of Home Sewage Treatment Plants and Pump Stations.

We can convert your existing septic tank / cesspit into a treatment plant, saving you thousands of pounds. We deal with septic tanks throughout Dorset, Hampshire, Wiltshire and Somerset.

We are specialists in Sewage and Effluent Treatment Systems, serving the counties of Devon, Somerset, Dorset, Wiltshire, Hampshire and West Sussex.

You’ll find us friendly and approachable yet efficient and professional. We have 25 years’ experience in drainage. Drainability was established in 2005.


Septic Tank & Soakaway Replacement


Treatment Plant Installation


Existing Septic Tank/Cesspit Conversion Units


Septic Tank Installation


Septic Tank Systems


Septic Tank Problems


Water Treatment Plant


Wastewater Treatment Plant


Sewage Treatment Works


Sewage Treatment Plant Installation