Extended Mono Chambers: Tesco Cardigan

Berrys Technologies’ Mono Chamber is a reliable tank access system installed throughout 70% of renovated forecourts in the UK; a sign of progression within the industry, as contractors seek environmental protection and overall longevity within their equipment. The chamber is engineered to provide a structurally sound, leak resistant tank top, famous for its ease of installation.

The Mono comes in two different models:


The original application is designed to completely eliminate fuel/water leakage, by directly welding the chamber onto the storage tank. This nullifies any opportunity for fluid to escape; from either the tank itself or the access point.


In addition, the Retro Mono, as the name suggests, offers a retrospective fit onto tanks already installed beneath the forecourt. The Retro system is also sealed through a stainless weld and coated with Endoprene, however the chamber is sealed to the tank on-site. So, customers are still able to use their existing tank. The choice is there if it’s just the chamber that needs replacing.

Unique project

Earlier in the year, Tesco turned to Berrys with a unique project opportunity; due to the landscape of a site located in Cardigan, Wales, where the below ground tanks are located on a steep hill. The incline made it considerably harder for the rear chambers to sit flush at ground level.

A vital part of any forecourt setup is ensuring access covers lay flat and do not obstruct vehicles. Another testing aspect of the project was keeping all connecting pipework at a functional height, limiting any risk of restricted flow rates during delivery.

Berrys are no stranger to fabricating bespoke orders, such as producing four Retro chambers to be installed onto the obscure Swansea filling station. Communication between the Berrys team and Premier Forecourts (installer for the project) was vital. Understanding the various ground depths from behind the canopy, in order to have two sets of chambers that could be accessed with ease. During the manufacturing process, taller chamber panels were laser cut with an increased height of 400mm, then, the retro access frame was welded to the base, to create an extended tank chamber.

Chambers welded on site

Once the chambers had arrived on site, both sets were welded onto the tank. A process which initially seemed quite complex, was made fairly productive. With both tall and short chamber variations, as each tank top could be fitted with the same amount of ground removed. With the help of Premier forecourts, all the pipework could then be connected at the same level using the well-known ‘plug and play’ system. This is a feature Berrys first introduced in 2006, linking every part of the fuel transfer set up using easy to install entry points and one weld pipework.




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