One Piece GRP Water Tanks

DECCA / ONE-PIECE GRP STORAGE

A single moulded body, delivered as one unit

A factory-moulded GRP body delivered as one unit. Decca helps you select the model, fittings and delivery arrangement.

Shop one-piece tanks →Discuss your tank →

Selection help · Drawing review · Agreed installation support

Decca one-piece GRP cold water tank with a single moulded body and separate cover — Example DP model. Cover, inlet arrangement and fittings depend on the selected product.

One-piece tanks at a glance

Check the full delivery route before ordering.

GRP means glass-reinforced plastic. Select the tank body, inlet arrangement and connection options as one complete specification.

Tank body	One moulded GRP body. Cover and access details vary by model.
Delivery check	The complete body must pass through the full route to its final position.
Insulation	Choose an insulated or uninsulated model where available.
Support	Provide the suitable flat, level support shown on the agreed tank drawing.
Access to retain	Room to position the body, open the access cover and maintain fittings.

Check the usable capacity

Nominal litres describe the listed tank size. Inlet, overflow and outlet arrangements set the water you can use. Review the DP model and connections in the detailed calculator.

Nominal: listed brim-full capacity.
Actual: water up to the top level.
Usable: water between the operating limits.

DP internal sizes are approximate. Decca confirms the final model, construction and levels.

Choose your tank in the shop.

Open the relevant range to compare the available products. Use the selected product page for current dimensions, specification, available extras and lead time.

01 / MODEL

Choose a nominal size and check the external dimensions.

02 / SPECIFICATION

Select the available insulation and AB or AG inlet arrangement for the model.

03 / CONNECTIONS

Choose the available inlet, overflow, outlet, drainage and monitoring options.

AB and AG are inlet-arrangement choices. Use the arrangement specified by your system designer; do not choose it from the nominal litres alone.

Browse one-piece tanks →Ask Decca for help →

Calculate, save and enquire

Use the detailed calculator for model dimensions and usable storage. Your selection and result carry into the enquiry.

Detailed capacity and PDF

Choose the DP model and connections. See nominal, actual and usable litres, download a technical sheet, or ask Decca to review your result.

Start the detailed calculator →

Quick volume estimate

For an initial litres/gallons estimate from dimensions. Continue to the detailed calculator when reviewing a DP model or connection layout.

Open the quick estimate →

Common questions

Does one-piece include the cover?

One-piece refers to the tank body. The access cover, lid and any raised inlet chamber are separate features; check the selected model detail.

Can I choose insulation and fittings?

The shop lists insulated and uninsulated one-piece products and the options available for each model. Confirm the required water duty and inlet arrangement before ordering.

Selection, manufacture and installation support

Decca helps select the model and fittings, reviews your drawing and delivery route for the complete moulded body, and manufactures the agreed tank. Ask us to include installation if required; the quotation will define that work and any testing, cleaning, disinfection and handover in our scope.

Your one-piece preference carries through. Add any location, timing, access or approval details you have.

01772 825757 · [email protected]

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