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Graf Carat Septic Tank 4PE–30PE

from £892.60

The Graf Carat septic tank provides a reliable, low-maintenance solution for off-mains drainage, designed for safe, long-term wastewater storage in properties without access to mains sewerage.

Available in sizes from 2,700 L to 6,500 L:

  • 2,700 L – suitable for up to 4 persons

  • 3,750 L – suitable for up to 11 persons

  • 4,800 L – suitable for up to 18 persons

  • 6,500 L – suitable for up to 30 persons

Key Features

  • Strong, durable tank body with no internal moving parts

  • Easy to install with gravel backfill (no concrete required)

  • EN12566-1 certified and fully compliant with UK regulations

  • Option for Pedestrian Lid or Heavy Duty Lid – vehicle loading up to 3.5t with a maxi tank dome (DN100 connection), composite plastic telescopic lid

  • Ideal for rural homes, cabins, and off-grid properties. Low weight making ideal for difficult to reach locations without a crane

Lid:
Size:

The Graf Carat septic tank provides a reliable, low-maintenance solution for off-mains drainage, designed for safe, long-term wastewater storage in properties without access to mains sewerage.

Available in sizes from 2,700 L to 6,500 L:

  • 2,700 L – suitable for up to 4 persons

  • 3,750 L – suitable for up to 11 persons

  • 4,800 L – suitable for up to 18 persons

  • 6,500 L – suitable for up to 30 persons

Key Features

  • Strong, durable tank body with no internal moving parts

  • Easy to install with gravel backfill (no concrete required)

  • EN12566-1 certified and fully compliant with UK regulations

  • Option for Pedestrian Lid or Heavy Duty Lid – vehicle loading up to 3.5t with a maxi tank dome (DN100 connection), composite plastic telescopic lid

  • Ideal for rural homes, cabins, and off-grid properties. Low weight making ideal for difficult to reach locations without a crane

Product Specifications

Size: 2700 litre, 4 person

Length (mm): 2080

Width (mm): 1565

Height (mm): 2010

Weight (kg): 145

Download specification

Size: 3750 litre, 11 person

Length (mm): 2280

Width (mm): 1755

Height (mm): 2200

Weight (kg): 175

Download specification

Size: 4800 litre, 18 person

Length (mm): 2280

Width (mm): 1985

Height (mm): 2430

Weight (kg): 220

Download specification

Size: 6500 litre, 30 person

Length (mm): 2390

Width (mm): 2190

Height (mm): 2710

Weight (kg): 260

Download specification

Installation Manual
Is your septic tank 2020 compliant?

Delivery & Returns

  • Free delivery for England, Wales, and most of mainland Scotland. Additional charges may apply for the Scottish Highlands, Scottish Islands, Northern Ireland, Isle of Man, Channel Islands, or other remote locations, confirmed before order confirmation or dispatch.

  • Most orders are fulfilled within 10 working days from payment. Larger or specialist items may take longer — please contact us if your order is time-critical.

  • Offloading is the customer’s responsibility. Suitable equipment should be available to safely remove goods from the delivery vehicle.

  • For full delivery details, see our Delivery Policy.

  • Returns & Refunds: Standard items can be returned within 14 days of receipt, subject to our Returns & Refunds Policy. Many products are bespoke or custom-made (modified dimensions, fittings, pumps, colours, etc.) and cannot be returned unless faulty.