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GRP One Piece Tanks

Our range of one piece tanks range from 45 litres to 16,000 litres. These are also known as Cistern Tanks.

One Piece Tank Features


Tricel Lanark one piece tanks are GRP constructed and are an economical alternative for cold water storage.

They are available in a variety of sizes ranging from 45 litres to 16,000 litres in both insulated and un-insulated options. We offer fast nationwide delivery. Next working day delivery is available on select items ordered before 12pm! One piece tanks or cistern tanks as they are commonly referred to are manufactured for both internal and external applications. These cold water one piece storage tanks are ideal for restricted spaces and can be custom built to meet specific requirements.

A Tricel Lanark One Piece Tank

Manufacturing since 1968 we have extensive experience in water storage solutions, don’t hesitate in giving us a call to discuss your water storage requirements. We have a specialised sales team ready to answer any queries you may have. Contact us today for a no-obligation quote.

If our standard tank sizes are not what you are looking for we provide a custom moulding service to fit the exact dimensions/space required. Condensation trays are available for all One Piece Tank Sizes. One Piece Tanks can also be supplied as a two-piece tank.

Tricel Lanark one piece water storage tanks are manufactured to British Standards and are WRAS Approved. Certifications and documentation for each tank is available for download.

One Piece Tank Specifications

  • Available from a standard range of one piece tanks or made to order
  • Next Working Day Delivery Available! T&Cs Apply
  • Pre-insulated one piece tanks are available with insulation in varying thicknesses (25mm and 50mm)
  • Fully self-draining one piece water storage tanks are available
  • All one-piece tanks comply with all relevant British Standards and Water Regulations
  • All materials used have been approved by WRAS (Water Regulation Advisory Scheme)
  • Standard capacities are available from 45 litres to 16,000 litres
  • Can be supplied in any BS5252 or RAL colour
  • Virtually ZERO maintenance
  • Can be supplied as Two-Piece for restricted access
  • Full range of connections/ancillary items available
  • All supplied within the scope of our BS EN ISO 9002 1994 Quality Assurance Registration

Bespoke One Piece Tanks

At Tricel Lanark we offer customers bespoke one piece tanks to meet their specific requirements.

Key Features:

  • CAT 5 Type AA/AB airgaps
  • Raised float valve to achieve greater useable capacity
  • Division can be included to provide twin compartment
  • Two piece tank options available
  • Reinforced base
One Piece Tank brochure

View Our Wide Range of One Piece Tanks in Our Online Store

Tricel Lanark one piece tanks
NP Logo - Cold Water Storage Tanks

are now supplying


Tank & Booster Set
Water Pressure Solution

Case studies

13978_Addiewell_130508 004

Site Assessment for replacing a leaking water tank

Company name: CHC Ltd
Product: Site visit, Tank supply & installation – Externally Flange tank with a packaged variable speed booster set
Tank dimensions & capacity: 2m x 1m x 1.5m, 3,000 litre water tank installation

13978_Addiewell_130508 004

Supply & Installation of a sectional water tank

Company name: Cairn Lodge Hotel
Product: Sectional water tank, pump set & enclosure
Tank dimensions & capacity: 2m x 1m x 1.5m, 3,000 litre water tank installation

13978_Addiewell_130508 004

Manufacture, delivery, installation and removal of their existing water tank system.

Company name: Cross house Hospital Scotland
Product: Two sectional cold water tanks
Tank dimensions & capacity: Tank 1: 12m x 9m x 2m | Tank 2: (216,000 Litres Nominal capacity)

Why work with us for your Water Storage Needs?

Over 50 years’ industry experience

Projects completed in the last 24 months

Tricel Lanark is a UK GRP Cold Water Storage Tank Manufacturer with a proven track record in the supply of water tanks to all industry sectors throughout the UK. We have an expert team on hand with over 50 Years' industry experience. Our team works hard to provide exceptional industry lead times from quotes, site visits, order processing, and delivery. We are a British Standard approved company with full certification through BSI/ISO9001 including WRAS approved certified water tanks suitable for potable drinking water.

  • Over 50 years of technical knowledge.
  • Quality assurance at a local level.
  • UK customer support teams, backup, replacement service & advice.
  • Supporting local and sustaining UK manufacturing.
  • Regional sales representatives for site visits, emergency water requirements, and project advice.


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