The 15000 Litre Shallow Dig Cesspool from GRAF is the larger Platin XL holding tank. It suits campsites, sports clubs and rural businesses that need generous storage in a long, low tank.
Like all Platin tanks, the 15000 litre shallow dig cesspool is wide and flat rather than tall. The tank body is just 1300 mm high, which keeps the excavation shallow, cuts digging costs and makes it a strong choice where the water table is high. GRAF designs Platin tanks to stay stable in groundwater, and the tough polyethylene body is far lighter than concrete.
It is watertight and holds all incoming effluent and raw sewage with no outlet. A licensed waste carrier empties it when it gets close to full.
Key Features
- 15,000 litre capacity (approx. 3,300 gallons)
- Low-profile GRAF Platin XL body, only 1300 mm high
- Suitable for installation in groundwater
- Holds raw sewage and effluent with no discharge to ground
- Maxi telescopic dome shaft with 150kg pedestrian lid as standard
- Optional 3.5 tonne traffic lid for driveways and yards
- 15 year manufacturer warranty
Sizing a 15000 Litre Shallow Dig Cesspool
For a permanent home, Building Regulations Approved Document H2 asks for a cesspool of at least 18,000 litres for two people. This size suits low-use, seasonal or temporary sites rather than a house, so check with your local Building Control if you are unsure.
At around 100 litres a day going in, this tank holds roughly 21 weeks of wastewater before it needs emptying.
Specification
- Capacity: 15,000 litres
- Tank type: GRAF Platin XL shallow dig tank
- Tank dimensions: 7500 x 2250 x 1300 mm (L x W x H, before dome shaft)
- Weight: 710 kg
- Colour: Grey / black
- Loading: Pedestrian as standard, vehicle with traffic lid
- Manufacturer: GRAF UK
Optional Extras
- Traffic Telescopic Lid 3.5 Tonne, for areas with car traffic
- Tank Alert EZ High Level Alarm, which sounds when the tank is nearly full so you can book a collection in good time
Delivery
We deliver free to UK mainland addresses. The tank arrives on a lorry, so you will need a way to offload it on the day. You can download the data sheet, drawing and installation guide from this page.






