400 Litre Underground Tank V1

The 400 Litre Underground Tank V1 is a compact, slimline underground water storage solution designed for properties with limited space. Manufactured in the UK from high-quality virgin polymer using a one-piece rotationally moulded design, this tank offers outstanding strength, durability, and long-term reliability. Its slim profile makes it ideal for tight installation areas, while the two 4" connections allow easy integration with standard UK underground pipework or the option to link multiple tanks together for increased capacity. Made from robust MDPE, the tank features a push-down 12" access lid, perfect for installing a submersible water pump for garden irrigation, car washing, or general water use. A pre-moulded 1" BSP outlet provides a convenient connection point for external pumps or plumbing systems. Backed by a 10-year warranty against manufacturing defects, this underground tank is a practical, long-lasting solution for discreet and efficient water storage.

Technical Specification

• Type: Underground Water Tank – V1
• Capacity: 400 litres
• Height: 1500mm
• Length: 1240mm
• Width: 345mm
• Weight: 35kg
• Material: MDPE (Medium Density Polyethylene)
• Inlets/Outlets: 4" (110mm) compatible connections
• Additional Outlet: 1" BSP pre-moulded outlet
• Access: 12" push-down lid
• Construction: One-piece rotationally moulded virgin polymer
• Warranty: 10 years against manufacturing defects