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Decca Tanks

Water Tanks for Commercial & Residential Buildings

BUILDING SERVICES / COLD WATER

Storage that fits the building and its demand

GRP cold water storage for offices, apartments and mixed-use buildings. Decca helps select the tank and review the plant-room layout.

Discuss your project →Check capacity & dimensions →

Selection help · Drawing review · Agreed installation support

YOUR WATER-STORAGE BRIEFUsable storageAgree the operating levels1Incoming supply2Storage & controls3Booster / distributionStart with the duty. Check capacity, access and connections.
Planning concept only. Tank proportions and water levels are illustrative.

What matters for this application

A tank may provide a break between the incoming supply and a booster-fed system, or form part of the building’s agreed storage strategy. Start with the building-services brief, then select the body construction and connections.

Demand Occupancy, outlets, operating hours and peak-use periods.
Supply Available inlet flow and refill conditions, confirmed for the site.
Capacity basis Required usable litres and the agreed operating water levels.
Continuity Required service during inspection, cleaning or a supply interruption.
Space Delivery route, support, headroom and fittings access.

Three decisions to settle early

01 / Planning priority

Match refill to demand

Ask the designer to compare the draw-off profile with the available refill rate. A nominal tank size alone does not show how the system will perform.

02 / Planning priority

Plan the whole plant room

Coordinate the tank, booster set, valves, drains and access equipment. Keep serviceable fittings reachable when adjacent plant and pipework are installed.

03 / Planning priority

Make maintenance workable

If divided storage is proposed, identify the capacity available with one compartment isolated. Confirm that the remaining system can provide the agreed service.

Keep the capacity basis with the litres

A larger brim-full volume does not automatically provide the required usable reserve. The inlet and overflow establish the upper operating level; the outlet arrangement and pump controls establish the lower limit. Use the detailed calculator to compare the proposed construction and levels, then obtain Decca’s confirmation of the selected arrangement.

Calculate & create a technical PDF →

WORKED-THROUGH PLANNING QUESTION

An apartment refurbishment with a restricted route

Compare the complete one-piece body, the separate two-piece sections and the sectional panels against the same measured route. If a TIF layout is considered near a wall, retain top access and access at the fittings face. This is a planning example, not a published Decca project.

Which construction should you compare?

Choose by the measured delivery route and installation layout, then confirm the selected product and duty.

TIF body height is limited to 3 m; other tank bodies to 4 m. Chambers, supports and maintenance headroom are additional. Final dimensions and access are agreed with Decca.

Build the tank proposal with Decca

Decca helps select the tank and reviews the plant-room drawing, delivery route and proposed connections with your team. We manufacture and supply the agreed tank and can quote for installation. Any testing, cleaning, disinfection and handover in our scope is agreed before work starts.

Share the information you already have. Mark unknown items for review rather than guessing them.

  • Building use, occupancy and operating hours.
  • Designer’s required usable capacity, capacity basis and refill information.
  • Room plan, delivery route, support and any lifting restrictions.
  • Booster/pump interfaces, connections, controls and drainage.
  • Required continuity, location, programme and approval evidence.

Start an application enquiry →

Common questions

The tank stores water. Any pressure-boosting duty belongs to the pump and distribution design. Confirm the complete system with the building-services designer.

There is no universal tank size for every development. Ask the designer to assess occupancy, demand, refill, resilience and water turnover for the building.

Only if the available compartment capacity, isolation and pipework can support the agreed demand. Confirm the operating arrangement rather than assuming a division guarantees continuity.

Technical references and scope

Use the current project specification and confirm the applicable document editions with the responsible designer. These links provide background guidance; they are not product-approval certificates.

Application planning guidance. Product suitability, approval evidence and the final Decca drawing must be confirmed for the order. Water demand and complete system design remain with the responsible designer.

Tank Calculator