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Decca Tanks

Water Storage for Sprinklers & Wet Risers

FIRE SYSTEMS / CAPACITY & SPECIFICATION

Plan the reserve around your fire designer’s brief

Share your fire designer’s storage brief. Decca reviews tank options, effective capacity and the required approval route before quotation.

Discuss your project →Check wet-riser capacity →

Selection help · Drawing review · Agreed installation support

Outdoor IFB sectional tank with Decca branding against a blue sky
Sectional water tank installation. Confirm the duty, effective reserve and required approvals with the project designer.Full photo ↗

What matters for this application

These are different duties. Establish the applicable standard, required effective capacity, refill assumptions and certification requirements before selecting a tank or requesting a price.

Residential sprinklers Designer to confirm the BS 9251 specification and applicable edition.
Commercial sprinklers Designer to confirm the BS EN 12845 specification and approval requirements.
Wet risers Designer to confirm the fire-main requirements, including BS 9990 where applicable.
Capacity Required effective litres, operating levels and permitted refill contribution.
Approval Decca does not hold LPCB LPS 1276 certification.

Three decisions to settle early

01 / Planning priority

Resolve certification at enquiry stage

If the specification requires an LPCB LPS 1276-certified tank, that is a key selection constraint. Decca must not be presented as offering that certification.

02 / Planning priority

Keep the reserve and pump detail together

Provide suction size, outlet arrangement, lower usable level, controls and any vortex-inhibitor requirements. The designer must confirm how these affect effective capacity.

03 / Planning priority

Agree the maintenance strategy

State whether compartments or a separate reserve are required and what service must remain available during inspection or cleaning. Do not treat fire reserve as ordinary consumable building storage.

Keep the capacity basis with the litres

The required reserve comes from the fire-system design, not a tank model number or a general litres-per-building rule. The planning calculator shows volumes for selected tank and connection assumptions. Wet-riser capacity can be calculated from the selected tank dimensions, connections and water levels, then downloaded as a technical planning sheet. Compare the result with the effective reserve required by your system specification. Commercial sprinkler enquiries follow the design-review route.

Calculate wet-riser capacity & PDF →

WORKED-THROUGH PLANNING QUESTION

The same nominal tank, different effective reserves

A change in suction arrangement or lower usable level changes the water available to the fire system. Compare options using the same effective-capacity basis and keep the assumptions with the quoted litres. The final tank and pump arrangement must be approved by the responsible designer.

Which construction should you compare?

Construction and certification are separate decisions. Confirm the approval route before using these range guides.

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 fire designer’s storage brief, operating levels, connections and required approval evidence 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.

  • Exact duty, design standard/edition and certification requirements.
  • Required effective litres, flow, duration and permitted refill assumptions from the designer.
  • Suction/outlet details, vortex protection, controls and operating levels.
  • Compartment strategy, support, room dimensions and maintenance access.
  • Inspection, testing, commissioning and handover requirements.

Start an application enquiry →

Choose the correct fire-water route

Residential sprinkler: use the planning calculator after the designer supplies the reserve and connection assumptions.
Wet riser: calculate tank capacity and download a technical sheet using the specified effective reserve and suction assumptions.
Commercial sprinkler: send the design brief and certification requirements for review.

Residential sprinkler planning →Calculate wet-riser capacity →

Common questions

Decca does not hold LPCB LPS 1276 certification. If it is mandatory for the project, identify that requirement before product selection.

No. It is a tank-volume planning aid. The responsible fire-system designer determines demand, effective reserve, refill, suction details and the required approvals.

Any combined or divided proposal needs explicit review by the fire and building-services designers. Confirm protection of the fire reserve, connections, isolation and capacity during maintenance.

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