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!

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 Devon.

We cover Devon DT7, EX1, EX10, EX11, EX12, EX13, EX14, EX15, EX16, EX17, EX18, EX19, EX2, EX20, EX21, EX22, EX23, EX3, EX31, EX32, EX33, EX34, EX35, EX36, EX37, EX38, EX39, EX4, EX5, EX6, EX7, EX8, EX9, PL1, PL15, PL16, PL19, PL20, PL21, PL3, PL4, PL5, PL6, PL7, PL8, PL9, TA21, TQ1, TQ10, TQ11, TQ12, TQ13, TQ14, TQ2, TQ3, TQ4, TQ5, TQ6, TQ7, TQ8, TQ9.

We are Devon’s Premier Suppliers and Installers Of Home Sewage Treatment Plants and Pump Stations. We are also a licensed contractor for Mantair, Matrix, Marsh and Bio-Pure.

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

We are specialists in Sewage and Effluent Treatment Systems, serving all of Devon, including: Appledore, Ashburton, Axminster, Axmouth, Bampton, Barnstaple, Beer, Bickleigh, Bideford, Bigbury on Sea, Bishopsteignton, Bovey Tracey, Bradninch, Braunton, Brixham, Broadhempston, Buckfastleigh, Budleigh Salterton, Chagford, Cheriton Bishop, Chudleigh, Chulmleigh, Clovelly, Colaton Raleigh, Colyford, Colyton, Combe Martin, Copplestone, Crediton, Croyde, Cullompton, Dartmoor, Dartmouth, Dawlish, Dawlish Warren, Devon, Exeter, Exminster, Exmoor, Exmouth, Great Torrington, Hatherleigh, Holsworthy, Honiton, Ilfracombe, Ivybridge, Kenton, Kingsbridge, Kingsteignton, Lapford, Lundy Island, Lydford, Lympstone, Lynmouth, Lynton, Moretonhampstead, Mortehoe, Newton Abbot, Newton Poppleford, Newton St. Cyres, North Tawton, Okehampton, Otterton, Ottery St. Mary, Paignton, Plymouth, Plympton, Plymstock, Powderham, Princetown, Salcombe, Sandford, Seaton, Shaldon, Sidbury, Sidford, Sidmouth, Silverton, South Brent, South Molton, Spreyton, Starcross, Sticklepath, Stoke Canon, Tavistock, Tedburn St. Mary, Teignmouth, Thorverton, Tiverton, Topsham, Torbay, Torcross, Torquay, Totnes, Uffculme, Westward Ho!, Whiddon Down, Whimple, Widecombe-in-the-Moor, Witheridge, Woodbury, Woodbury Salterton, Woolacombe, Yelverton, Zeal Monachorum

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

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