18 Person 5200 Litre Shallow Dig Septic Tank
£1,934.00 Exc VAT (£2,320.80 Inc VAT)
Shipping 2 – 5 Working Days
Delivery cost depends on location, access and unloading requirements.
Request A Delivery Quote
Some tanks require a personalised delivery quote due to size, location and access requirements.
Product Description
18 Person 5200 Litre Shallow Dig Septic Tank
The 18 Person 5200 Litre Shallow Dig Septic Tank is a high-capacity underground wastewater solution designed for larger domestic properties, farms, holiday accommodation and commercial premises that are not connected to the mains sewer network. Suitable for properties with up to 18 users, this robust septic tank provides dependable long-term wastewater treatment and storage.
Manufactured in the UK from high-quality rotationally moulded polyethylene, the tank is lightweight, corrosion resistant and engineered for exceptional durability. Its reinforced ribbed construction provides excellent structural strength and, in many standard installations, allows the use of an environmentally friendly pea gravel backfill, helping to eliminate the need for costly concrete encasement.
The shallow dig design reduces excavation requirements, making installation quicker and more cost-effective while also making it well suited to sites with higher groundwater levels. Supplied complete with a Zoeller Residential Septic Tank Effluent Filter, the system helps improve effluent quality by preventing solids from entering the drainage field, reducing maintenance requirements and helping to prolong the life of the soakaway.
Backed by a 10 Year Manufacturer’s Warranty, this septic tank offers a reliable, low-maintenance wastewater solution for larger off-mains drainage applications.
Suitable For
- Large domestic properties
- Farms and agricultural buildings
- Holiday homes and holiday parks
- Small commercial premises
- Offices and workshops
- Properties without access to mains drainage
Key Features
- Suitable for properties with up to 18 people
- 5200 litre underground septic tank
- Manufactured from rotationally moulded polyethylene
- Reinforced ribbed construction for exceptional strength
- Shallow dig design for easier installation
- Suitable for pea gravel backfill in many standard installations
- Supplied with a Zoeller Residential Septic Tank Effluent Filter
- Patented bypass protection sleeve helps retain solids during filter cleaning
- 110mm inlet and outlet pipe connections as standard
- Optional telescopic neck available for deeper installations
- Manufactured in the UK
- 10 Year Manufacturer’s Warranty
Optional Extras
- Telescopic Neck – Extends the existing turret by approximately 300mm to 800mm for deeper installations.
- Pedestrian Lid Cover – Suitable for installations accessed by foot traffic only.
- Vehicle Rated Lid Cover – Designed for installations beneath driveways and areas subject to vehicle traffic.
Important Information
This septic tank is designed for properties without access to the mains sewer network and should be installed in accordance with the manufacturer’s installation instructions and current Building Regulations. Regular inspection and periodic emptying will help maintain efficient operation and maximise the lifespan of the system.
Product Specification
| Dimensions | L 2700 x W 2700 x H 1725 mm |
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| Manufacturer | |
| Material | |
| Capacity |
Delivery and Returns
Delivery Information
Shipping costs for standard postcodes within UK Mainland are calculated at checkout when a postcode is entered.
Delivery charges are based on current manufacturer and courier rates. In some cases, delivery costs may be subject to confirmation after an order has been placed due to supplier delivery zones or freight changes. If an additional delivery charge applies, the customer will be notified before the order is dispatched and given the option to proceed or cancel the order for a full refund.
Some areas may incur additional charges, including:
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Scottish Highlands and Islands
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Isle of Wight, Channel Islands, Isle of Man, Anglesey, Western Isles, Shetland Islands, Orkney Islands, Isles of Scilly
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Northern Ireland
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Republic of Ireland
Additional charges may apply for postcodes in these areas:
AB, BT, CA, CT, DD, DG, EH, FK, G, GY, IM, IV, JE, KA, KW, KY, LD, LL, ML, PA, PH, PO 30–41, SA, SY, TD, TN, TR, ZE
If your postcode is listed above, please contact us before ordering for a shipping quote.
Some products are only available for delivery within England & Wales; this will be stated on the product page. If you are outside this area, please contact us for a quotation.
Delivery Lead Times
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Refer to individual product pages for expected delivery times.
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Custom orders may take longer; please enquire before ordering.
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Items on the same order may be delivered separately due to stock locations.
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If delivery is delayed, we will notify you via email.
Delivery Method
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All deliveries are kerbside unless stated otherwise.
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For larger items, customer offloading may be required.
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Someone must be available to receive and inspect the goods.
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Goods may be left in a safe place at the customer’s risk; Online Tank Store cannot accept responsibility once goods are left.
Note: By signing for the goods, you confirm that the outer packaging is intact and free from visible damage. Any visible damage must be noted on the delivery paperwork or the delivery refused.
Scheduled delivery times may be accommodated; please add instructions in the Customer Notes section at checkout.
Missing or Faulty Items
If items are missing or arrive damaged:
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Contact us within 48 hours of delivery at [email protected]
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Provide:
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Order number
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Photos of the goods
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Brief description of the issue
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We may require images for the manufacturer to provide replacements.
Delivery Charges & Returns
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Ensure the product is the correct size and suitable for your intended use.
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Standard tanks (no customisation) are returnable but subject to a restocking charge and must be returned in A1 condition. Returns may be expensive due to size and weight; please check before ordering.
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Failed delivery attempts: After one unsuccessful delivery attempt, items will be returned to the depot, and redelivery charges may apply.
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Special or custom tanks are non-returnable. If the wrong product is ordered or the item is no longer required, it cannot be returned, and no refund will be issued.
Returns & Refunds
Our full returns and refund policy can be found by clicking here.
It is important to us that the items you order are correct for your needs however, we understand that situations and requirements can change. It can be costly to return an order so please ensure you are certain of your requirements before you order and that you have read the returns policy above for details.
Custom Tank – An order is considered ‘custom’ when a non-standard configuration or colour is requested. Custom orders are not eligible for return so please ensure the product is what you require before ordering. By purchasing, you are agreeing to the above terms.