Collection · 43 products in stock

ONE PIECE INSULATED GRP WATER
TANKS

Single-section GRP cold water storage tanks with factory-fitted insulation for plant room and loft installations where sectional assembly is not required.
162L–3,000L
Capacity range
43
Products
Free delivery
Nationwide

One Piece Insulated GRP Water Tanks

Showing 1–12 of 43
90L One Piece Insulated GRP Water Tank
Purewater Storage Lt

90L One Piece Insulated GRP Water Tank

€612.64 ex VAT (€753.54 incl. VAT)
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825L One Piece Insulated GRP Water Tank
Purewater Storage Lt

825L One Piece Insulated GRP Water Tank

€1,856.46 ex VAT (€2,283.44 incl. VAT)
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751L One Piece Insulated GRP Water Tank
Purewater Storage Lt

751L One Piece Insulated GRP Water Tank

€1,117.05 ex VAT (€1,373.97 incl. VAT)
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750L One Piece Insulated GRP Water Tank
Purewater Storage Lt

750L One Piece Insulated GRP Water Tank

€1,168.38 ex VAT (€1,437.10 incl. VAT)
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712L One Piece Insulated GRP Water Tank
Purewater Storage Lt

712L One Piece Insulated GRP Water Tank

€1,127.54 ex VAT (€1,386.87 incl. VAT)
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680L One Piece Insulated GRP Water Tank
Purewater Storage Lt

680L One Piece Insulated GRP Water Tank

€1,127.25 ex VAT (€1,386.51 incl. VAT)
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650L One Piece Insulated GRP Water Tank
Purewater Storage Lt

650L One Piece Insulated GRP Water Tank

€1,340.71 ex VAT (€1,649.07 incl. VAT)
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501L One Piece Insulated GRP Water Tank
Purewater Storage Lt

501L One Piece Insulated GRP Water Tank

€1,131.32 ex VAT (€1,391.52 incl. VAT)
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500L One Piece Insulated GRP Water Tank
Purewater Storage Lt

500L One Piece Insulated GRP Water Tank

€970.13 ex VAT (€1,193.25 incl. VAT)
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375L One Piece Insulated GRP Water Tank
Purewater Storage Lt

375L One Piece Insulated GRP Water Tank

€1,103.11 ex VAT (€1,356.82 incl. VAT)
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3636L One Piece Insulated GRP Water Tank
Purewater Storage Lt

3636L One Piece Insulated GRP Water Tank

€3,845.50 ex VAT (€4,729.96 incl. VAT)
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338L One Piece Insulated GRP Water Tank
Purewater Storage Lt

338L One Piece Insulated GRP Water Tank

€983.70 ex VAT (€1,209.95 incl. VAT)
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About one piece insulated grp water tanks · Buying guide

Choosing the right
One Piece Insulated GRP Water Tanks
in Ireland

An oil tank is a long-term investment — most domestic heating oil tanks in Ireland are expected to last 20–25 years when correctly sited and maintained. Whether you're replacing an old steel tank, building a new home or specifying for a commercial project, the right choice comes down to three things: capacity, tank type, and compliance with Irish regulations.

Bunded vs single-skin oil tanks

A bunded oil tank is a tank-within-a-tank — the inner tank holds the fuel, the outer tank captures any leak. Under Irish EPA guidance, bunded tanks are required for any installation over 2,500 litres, within 10 metres of a watercourse, or within 50 metres of a borehole or well. For most new domestic installations a bunded tank is the safer, more compliant choice.

Single-skin tanks remain suitable for replacement installations where site conditions allow, and typically come in at a lower price point. If you're unsure which applies to your site, talk to a specialist before you order.

What size oil tank do I need?

As a rough guide, a typical 3-bed home uses 1,500–2,000 litres of heating oil per year. A 1,200L–1,400L tank covers most domestic households with one or two deliveries a year; larger homes, oil-fired Aga or pool heating may justify a 1,800L–2,500L tank. Commercial and agricultural sites usually start at 5,000L.

  • 1–2 bed home — 1,000L to 1,200L
  • 3–4 bed home — 1,200L to 1,800L
  • Large / rural home — 1,800L to 2,500L
  • Commercial / agricultural — 5,000L upwards

Manufacturers we stock

We carry the leading brands on the Irish market — Kingspan Titan, Carbery, Harlequin and DESO. All tanks are OFTEC-approved or equivalent, manufactured to BS EN 13341 / BS 5410, and supplied with manufacturer warranty. Free nationwide delivery on orders over €500, typically within 3–5 working days.

Frequently asked questions

One Piece Insulated GRP Water Tanks FAQs

What size one-piece GRP tank can be installed through a standard loft hatch?
Why choose a two-piece tank over a one-piece tank?
What is a one-piece insulated GRP water tank?
What are the advantages of insulation on a GRP water tank?
Need help choosing?

Talk to a
specialist

Sizing, regulations, installation. We've been answering these questions since 1999.

Phone 051 351 325Mon–Fri 9–5 WhatsApp 051 351 3257 days Email info@tanks.ieReply within 2 hours