Precolor's WRAS Approval & Quality Assurance



When you buy a GRP storage tank from Precolor you don't just get a tank, it comes with complete peace of mind.  You can rest assured that our unrivalled depth of knowledge and the vast industry experience we have gained over four decades, enables us to help our customers in every possible way. 


  • We have the largest certification for one piece tanks in the UK with approval up to 90,000L.
  • Most other tank manufacturers are only certified up to 9,000L for one piece tanks.
  • Customised design and bespoke manufacturing of the finest qualtity, multi purpose storage tanks.
  • Site visits to ascertain your exact needs.
  • Technical knowledge, which is second to none.
  • Exceptional customer service & after care.
  • Total peace of mind with our unique 10 year warranty.

Precolor finest quality water tanks ISO 9001:2015

As you would expect from a company with decades of experience, quality is the foundation of our company and is fully embedded in our purpose and values.

The Precolor brand is trusted and chosen by our customers.  This trust is based upon our quality image and our reputation for consistently delivering high quality products, this must be maintained and enhanced.

A Precolor brand name on a product or service is a promise that it is safe, that it complies with all the relevant laws and regulations and that it consistently meets our high standards of quality.

We are involved in and dedicated to achieving high quality standards for our products and services through the application of the Precolor Quality Management System fully aligned to                              BS EN ISO 9001:2015 and implemented across our organisation.

We aim to consistenly exceed our customers expectations.  Our commitment to our Quality management system is paramount along with our WRAS approval, ensures our water storage tanks are the finest quality. 

WRAS Approved One piece potable water storage tank cerificate (299kb)

WRAS Approval
WRAS approved water tanks

Precolor now has the largest WRAS approval in the UK for rectangular one piece tanks.

Our full range of potable water tanks have under gone independant mechanical and water quality testing.

They have been fully approved by the Water Regulations Advisory Scheme (WRAS) ensuring that the water tank you purchase is fully compliant with current water regaulations.

The current water regulation state:-

Any water fitting, which when installed, will carry or receive water from the public mains water supply in the UK, must comply with the Water Supply (water fittings) regulations or Scottish Byelaws.  These require that a water fitting should not cause waste, misuse, undue consumption or contamination of the water supply and must be "of an appropriate quality and standard". 

Procuring one of Precolor's WRAS approved potable water storage tanks is the best way to demonstrate that your potable water tank is fully compliant with the requirments of the regulations and byelaws.

We have the largest certification for one piece water tanks in the UK with approval up to 90,000L.

Precolor WRAS approved one piece tanks (223kb)