Designed for off-mains site sanitation, the 4,800 Litre (1,000 Gallon) Sit-On Waste Tank provides a reliable, heavy-duty effluent storage solution for 2+1 toilet blocks, portable office cabins, and welfare units. Manufactured in the UK from heavy-gauge mild steel, this low-profile tank allows toilet blocks or welfare containers to be positioned directly on top, maximizing site space. Features multiple 110mm inlet ports, empty/full inspection hatches, and high-capacity suction points for fast vacuum tanker servicing. Delivered fully tested across the UK.
£2,086.00
Estimated Arrival 5-15 Business Days
– Delivered nationwide from our yard in Wolverhampton.
– 30 days return policy
Managing site sanitation where mains sewer connections are unavailable requires high-capacity, space-efficient waste containment. The 4,800L Sit-On Waste Tank is engineered to sit directly underneath 2+1 toilet blocks, shower units, or temporary welfare cabins, creating a self-contained sanitation setup without consuming valuable ground footprint.
Fabricated in the UK from thick, seam-welded mild steel, each effluent tank is fully pressure-tested to ensure leak-proof performance across long-term construction projects, remote industrial sites, and outdoor events.
Space-Efficient Design: Engineered with heavy-duty internal structural baffling and reinforced top plates, allowing standard 2+1 toilet blocks to sit directly on top of the tank frame.
Low Deck Height: Keeps overall step-up height into the toilet block to a minimum, ensuring easy and safe access for workers and visitors.
Multiple 110mm Inlets: Features strategic waste inlet positions along the top plate to align seamlessly with standard 2+1 toilet waste drop points.
Bauer Tanker Fittings: Equipped with quick-release Bauer vacuum connections, allowing waste clearance tankers to empty the tank rapidly without disturbing the toilet block above.
Large Inspection Hatches: Fitted with removable access covers for straightforward internal cleaning, flushing, and depth monitoring.
Integrated Lifting Eyes: Corner lifting lugs engineered for safe crane loading via HIAB or forklift handling when empty.
| Specification Feature | Metric Measurement | Imperial Equivalent / Details |
| Nominal Capacity | 4,800 Litres | ~1,055 UK Gallons (1,000 Gal class) |
| Approx. External Length | 3,650 mm | 12 ft 0 in |
| Approx. External Width | 2,440 mm | 8 ft 0 in |
| Approx. Height / Profile | 550 mm – 600 mm | ~1 ft 10 in (Low Profile) |
| Approx. Tare Weight (Empty) | ~850 kg – 950 kg | Heavy-duty welded steel chassis |
| Structural Compatibility | Engineered to support 2+1 portable toilet blocks and 12ft–20ft welfare units | |
| Inlet / Outlet Ports | Multiple 110mm (4-inch) push-fit waste inlets | |
| Tanker Service Ports | 2x 5-inch Bauer vacuum tanker extraction points | |
| Finish & Coating | High-durability anti-corrosive primer & marine-grade topcoat |
To ensure safe site installation and trouble-free servicing:
Offloading & Position: Must be offloaded empty using suitable crane slings via integrated corner lifting eyes or forklift tines.
Ground Preparation: Position on a flat, level, hardstanding surface (concrete pad, asphalt, or compacted gravel) to ensure even load distribution under the toilet block.
Servicing Access: Position the unit with clear access for 3,000–4,000 gallon vacuum suction tankers to connect to extraction ports.
Emptying frequency depends on the number of site workers and usage volume. A 4,800-litre (1,000-gallon) effluent tank connected to a 2+1 toilet block typically supports 15–20 full-time site workers for 2 to 4 weeks before requiring vacuum tanker servicing.
Yes. This tank is specifically engineered with reinforced internal baffling and heavy-duty steel framing designed to support the weight of a standard 2+1 portable toilet block or welfare cabin directly on top.
The tank features integrated quick-connect Bauer fittings and large inspection hatches, allowing standard vacuum tankers to pump out liquid effluent quickly without needing to disconnect or move the toilet block above.
