Sectional Tanks Installation

Standard Sectional Tank installation comes complete with Bolts galvanised to BS EN ISO 1461:1999, and we recommend that Consultants specify Stainless Steel grade 316 S16 bolts for underwater and lid installations. When there is only one water storage tank in a building, and its capacity exceeds 1000 litres, it is recommended that a divider be installed to prevent interruptions of the water supply during repairs or maintenance. The cistern shall be provided with compartments or a standby cistern. Whenever drinking water is being stored, two separate tanks are recommended because cross contamination between sides of a wall can be challenging to detect.

Condensation trays should be used in sectional tank installation where condensation drips from pipework or the tank to prevent nuisance damage and slippery floors. Ball valve housings are an enclosed chamber containing an access hatch above the level of the cover, allowing the level control mechanism to be mounted higher than it would otherwise be. 

The overflows must be placed on the tank side wall and not on the Ball Valve Housing. Water must be kept below the tank roof level. An internal ladder, as well as an external ladder, should be installed in tanks with a depth of 1m or greater. If the tank is on a raised platform, ladders may be required on tanks lower than this height where the tank is 2m or more from the top of the tank to the finished floor level. Safety cages should be installed on external ladders.

When a tank is 2m or more from the top of the tank to the finished ground level, a guardrail should be installed, enclosing all access points to the tank roof. Additional safety guards may be required for ladders depending on their location.

Height

Where height space is restricted above the tank, the side access hatch is a good choice, with an opening of 600mm x 600mm. It is available as a 1000mm x 1000mm metric panel, and it also provides more accessible access to the inside of a tank. The side access hatch has three main components: the panel, the flange, and the flat hatch sheet. To open the hatch, the flat hatch sheet is simply unbolted from the flange. The hatch can only be opened if the water level inside the tank is lower than the hatch. This Access Hatch was designed so that both the head of the bolt and the nut are accessible. A wrench can then be placed on the bolt head and the nut, preventing the bolt from spinning without opening.