Large white horizontal GRP tank on moulded GRP saddles at an open site

Our horizontal and vertical tank sizes, by diameter

Every tank we build sits on one of seven diameters, with length or height set by capacity. Check the dimensions before you excavate or book a crane.

  • 7 standard diameters
  • Horizontal and vertical
  • 2,000 to 100,000 L
  • Any capacity in between

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How to read the tables

We build on seven diameters: 1.20, 1.50, 1.80, 2.00, 2.40, 3.00 and 3.50 m. Each diameter covers a band of capacities set by the length of a horizontal tank or the height of a vertical one.

Figures come from our size tables and are approximate. Capacities between the listed figures are built too, such as 6,500 litres at 1.20 m diameter, and exact dimensions are on the drawing supplied with the quotation on request.

Horizontal tanks (buried or above ground)

DiameterCapacitiesApprox. length
1.20 m3,000 – 5,000 L2.6 – 4.5 m
1.50 m5,000 – 12,000 L2.9 – 6.7 m
1.80 m8,000 – 18,000 L3.0 – 7.2 m
2.00 m10,000 – 25,000 L3.3 – 8.0 m
2.40 m15,000 – 30,000 L3.4 – 6.5 m
3.00 m30,000 – 60,000 L4.5 – 8.8 m
3.50 m50,000 – 100,000 L4.3 – 10.5 m

Vertical tanks

Example from production: a 75,000-litre vertical tank, 3.50 m in diameter and 8 m tall.

DiameterCapacitiesApprox. height
1.20 m2,000 – 3,000 L1.95 – 2.7 m
1.50 m4,000 – 6,000 LBy capacity
1.80 m5,000 – 11,000 L2.2 – 4.5 m
2.00 m10,000 – 15,000 LBy capacity
2.40 m15,000 – 30,000 LBy capacity
3.00 m30,000 – 50,000 LBy capacity
3.50 m50,000 – 100,000 L5.6 – 10.8 m

Common capacities and the standard tank specification

The standard buried tank has a 50 cm inspection manhole, 2-inch and 1-inch inlets and outlets with vents, and a lifting lug for crane placement. Before ordering, check the pit length, the headroom for a vertical tank, and truck and crane access to the site.

  • 3,000 L: 1.20 m diameter, about 2.60 m long.
  • 5,000 L: 1.20 m × 4.50 m, or 1.50 m × 2.90 m.
  • 8,000 L: 1.80 m × 3.00 m.
  • 10,000 L: 1.80 m × 4.00 m, with an 18 mm wall.
  • 20,000 L: 2.00 m × 6.50 m.
  • 30,000 L: 3.00 m × 4.50 m.

Frequently asked questions

What are the dimensions of a 10,000-litre tank?

The standard horizontal tank is about 1.80 m in diameter and 4.00 m long. It can also be built at 2.00 m diameter and shorter, or 1.50 m diameter and longer.

What are the dimensions of a 5,000-litre tank?

Horizontal, about 1.20 m × 4.50 m, or 1.50 m × 2.90 m.

How tall is a vertical tank?

At 1.20 m diameter, 1.95 to 2.7 m for 2,000 to 3,000 litres; at 1.80 m diameter, 2.2 to 4.5 m for 5,000 to 11,000 litres.

Are these dimensions final?

They are approximate figures from our tables. Exact dimensions for your tank are on the drawing supplied with the quotation on request.

What is the largest tank you make?

Our tables reach 100,000 litres, horizontal and vertical, at 3.50 m diameter. Larger capacities are reviewed on request.

Ready for your quote?

Send the type, capacity and city, and we reply within an hour.

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