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About Us

Digestors, Silos & Tanks T/a Silotank is a privately owned business were the key shareholders are actively involved in the day to day operation of the business. The management team share over 50 years of expertise in thermoplastic and GRP products which has allowed Silotank to successfully deliver projects . Started in the 1990’s by the Carmichael family John Carmichael still plays an active role in the day to day running of the business.

Our Market

Silotank offer a range of products suitable for the Water & Waste, Chemical, Process, Food & Drink, Pharmaceutical, Civil Engineering, Petrochemical and Paper & Pulp industries. We are based in Belfast close to the main port for Northern Ireland which gives us a great advantage to ship across the UK, Europe and further afield.

Our aim

Silotank aim to utilise its staff skills, experience and materials to provide a quality product meeting the needs of its customer. By doing this our customers will continue to work with us knowing they can rely on our design and manufacturing capabilities which means our recommendations are not biased.


Silotank manufacture to BS EN 12573:2001 for thermoplastic tanks and BS4994:1987 for GRP tanks. Our Thermoplastic tanks are manufactured using the latest in Butt welding technologies while our GRP tanks are manufactured using 3 axis helical filament winding. All tanks are designed and manufactured on an individual basis and drawings are issued to customers for sign off prior to manufacture.


Silotank became fully certified with ISO9001 in 1995 and have continually improved each year at their annual audit. We are also part of Achillies UVDB accredited. In house quality procedures are key to both Silotanks success and being given these certifications.


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+44 (0)28 90 626256
+44 (0)28 90 626224