3500 Litre Underground Rain Water Tank

Our 3500 Litre Underground Rain Water Tank is rotationally moulded from high quality virgin MDPE. This NON Potable Underground Water Tank (Not Suitable for Drinking Water) is Made In Britain and is frost proof so it will not crack in cold temperatures, making it ideal to store water or for rainwater harvesting installations.

This 3500 litre underground rainwater tank must be fully encased in concrete if installed in clay soil or high water table area and is only designed to take pedestrian traffic over it once it is installed. There are multiple inlet positions on top of the tank that can accept fittings up to 4", this tank also has a 500mm extended neck which can be cut down if required. Please make sure you read all installation instructions before purchasing this tank. The 3500 Litre underground Water Tank is suitable for the collection and storage of rain water.

This high quality underground rainwater tank comes with a 450mm vented lid which is also used for general maintenance. This 3500 litre Underground Water Tank does not have any outlet as standard but has multiple positions that can take outlets up to 4".

Specifications:

• Capacity: 3500 Litre (770 gallons) 
• Height: 1225mm
• Diameter: 2150mm
• Weight: 120kg
• Colour: Black
• Virgin Medium Density Polyethylene (MDPE)
• 450mm Screw Down Lid
• 10 Year Warranty Against Manufacturing Defects

Installation Instructions for underground Water Tanks 

Optional Extras:

• Pump & Tap System: This system pumps water from your rainwater storage tank to a wall mounted tap. The HydroForce Series 3 is a British made, electronically-controlled, pressure-sensitive, centrifugal roto-dynamic pump with no reciprocating parts. Max head (nominal) 35 metres, pump pressure (nominal) at outlet 3.5 bar, max suction 3 metres. It comes with two-year return-to-base guarantee.
• Underground Rain Water Filter: 2 options depending on the number of downpipes you will be feeding into the tank.
• Mains Water Back Up: This back up in box detects when the tank water level is running low and tops up the water level to ensure the tank never runs out of a water supply.