
GRP Tank Combination Unit 4000 Litre, CAT 5 AB air gap
The unit is designed as a single piece item with an internal dividing wall at full height. One internal section being the wet compartment for the stored water which is accessed via a lid mounted lockable manway. Beyond the internal dividing wall is the dry side where the booster set is to be positioned. The internal dividing wall has the inlet and outlet connection within it, the overflow, warning pipe and screened spill over weir terminate through the wet side wall to outside and do not therefore normally require any additional pipework. The dry side is accessed by a large 1600 x 1600mm hinged and lockable door, which is fitted with louvered vents to ensure adequate ventilation.
If chosen with the Foundation Skid the whole unit is mounted and fixed too a fully welded galvanised steel skid which allows offloading and movement on site by fork lift struck. The principle is to provide the unit to the booster set manufacturer where the booster and associated electrical equipment can be fitted. The completed unit can then be delivered to site where once positioned it requires the simple connection of the mains pipework, outlet pipework to the services, and electrical supply, making it a "plug and play' unit requiring minimal onsite installation.
All units are fitted with the following:
1 No 50mm screened lid vent
1 No single 1600 x 1600mm door to the end face of the pump compartment
1 No lockable access manway fitted to the roof of the wet compartment.
1 No EPDM mat to the floor of the pump compartment
A fully encapsulated ply base.
Units do not include electrical components, wiring, pump sets, control equipment, connections of any kind or internal pipework.
Units not fitted with a galvanised steel skid are suitable for positioning onto a structural pad only which should be flat, level and continuous and be +/- 2mm over the surface area.
Units not fitted with a galvanised steel skid have an external height 200mm less than stated in the overall dimensions column of this document
Availability 5-6 weeks
**Cat 5 (AB and AG) supplied loose
AG Airgap
IP22-AG-SL
42mm screened lid vent
22mm equilibrium float valve
35mm screened overflow
22mm screened warning pipe
IP28-AG-SL
42mm screened lid vent
28mm equilibrium float valve
42mm screened overflow
22mm screened warning pipe
IP35-AG-SL
42mm screened lid vent
35mm equilibrium float valve
50mm screened overflow
22mm screened warning pipe
IP42-AG-SL
42mm screened lid vent
42mm equilibrium float valve
67mm screened overflow
22mm screened warning pipe
IP50-AG-SL
50mm screened lid vent
50mm equilibrium float valve
80mm screened overflow
22mm screened warning pipe
AB Airgap
IP22-AB-SL
22mm screened lid vent
22mm equilibrium float valve c/w drop arm and float
35mm screened overflow
22mm screened warning pipe
IP28-AB-SL
22mm screened lid vent
28mm equilibrium float valve c/w drop arm and float
42mm screened overflow
22mm screened warning pipe
IP35-AB-SL
22mm screened lid vent
35mm equilibrium float valve c/w drop arm and float
50mm screened overflow
22mm screened warning pipe
IP42-AB-SL
22mm screened lid vent
42mm equilibrium float valve c/w drop arm and float
67mm screened overflow
22mm screened warning pipe
IP50-AB-SL
22mm screened lid vent
50mm equilibrium float valve c/w drop arm and float
80mm screened overflow
22mm screened warning pipe
| Nominal Capacity | 5500 Litres |
| Actual Capacity Approx. | 4000 Litres |
| Overall Dimensions | 3600 x 2000 x 2250mm high |
| Wet Compartment | 1700 x 1800 x 1800mm |
| Pump Compartment | 1700 x 1800 x 1800mm |
| Material | GRP / Fibreglass |
|---|
Important — please read
Please ensure the product you are ordering is the correct size and suitable for the purpose. Special order, bespoke and non-stock tanks are not returnable. If you order a tank and find it is too big, too small, or unsuitable for your requirements, it can be expensive to return. Our cancellation & returns policy explains this in more detail — see Terms & Conditions.
Delivery charges
Our shipping costs cover most of the UK. However, parts of England, the Scottish Highlands and Islands (including areas north of the Glasgow / Edinburgh border), Isle of Wight, Channel Islands, Isle of Man, Anglesey, Western Isles, Shetland Islands, Orkney Islands, Isles of Scilly, Northern Ireland and the Republic of Ireland may cost more.
Please call before ordering if the delivery postcode is listed below. There may be additional shipping costs.
- AB
- BT
- CA
- CT
- DD
- DG
- EH
- FK
- G
- GY
- IM
- IV
- JE
- KA
- KW
- KY
- LD
- LL
- ML
- PA
- PH
- PO 30–41 Isle of Wight
- SA
- SY
- TD
- TN
- TR
- ZE
- Southern Ireland
Looking to avoid shipping charges?
All our tanks are available for collection ex works. Our suppliers are based all over the UK — please call if you wish to collect.
Overseas orders
International orders are welcome. Payment is by IBAN / SWIFT / BIC, MoneyGram and letters of credit. We regret that credit cards are not accepted for international orders.
A purchase order is required; we will then create a pro-forma invoice, and tanks are ordered on clearance of funds.
If you require additional export documentation — for example a Certificate of Origin, or commercial invoices certified by the Chamber of Commerce — you must notify us before completion of your order, as we will have to invoice cost and admin charges to the order.
Please call if you have any questions: +44 (0)1643 703358
Offloading
Unless a HIAB delivery has been booked at additional cost, it is the customer’s responsibility to offload with suitable equipment on the day of delivery. A failed delivery may result in additional charges.
We recommend that installers, plant hire and installation materials — excavators, aggregates and so on — are not booked until you are in receipt of the goods. Tanks Direct cannot be held responsible for costs incurred due to unforeseen delays; please see our terms for more details.
Any questions about your delivery? Contact the Sales Team on 01643 703358.
Looking to return an item?
If you wish to return goods, please complete the form on this page to provide further information.
Once your request is approved, a valid Returns Authorisation Number (RAN) will be issued to initiate the returns process along with information on how & where to return your order along with any costs involved.
Please DO NOT return any goods without this authorisation. Goods cannot be accepted without this.
Returns are not accepted at our Minehead Office, please wait until we contact you before returning any goods.
Please click here to request a return of one of our products.
Talk to a
specialist
Sizing, regulations, installation. Our team has been answering these questions for over 25 years.
Why Tanks-Direct
22 years. 100,000+ tanks. Specialists, not generalists.
Nationwide delivery
GB and Northern Ireland covered. HIAB and crane offload available. Highlands and Islands quoted on request.
WRAS & BS EN compliant
Every potable tank is independently certified. Documentation supplied with each delivery.
Best-price guarantee
4.6/5 on Feefo from 1272 verified reviews. We price-match any genuine like-for-like quote.
Specialist advice
Trade-grade phone and email support, Mon-Fri 8am-5pm. Site visits for orders over £2,500.




