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8400 Litres Underground Rainwater Harvesting Header Tank System - Twin Neck

Product Code: GU8400HTS
£2,775.00 ex. VAT
£3,330.00 inc. VAT
UK Mainland Delivery: £225.00 + VAT
(Exclusions apply - click for more details)
Lead Time: 3-5 working days
Description Specification Technical Datasheets (1) Related Products (8)

This complete 8400 litre header tank rainwater harvesting system is ideal for collecting and storing rainwater to use in your home for tasks such as flushing the toilet, washing clothes or washing dishes. The 8400 litre system is suitable for medium sized installations such as a 3 or 4 bedroom house.

The header tank system uses an 82 litre tank and water is pumped to the header tank directly from the rainwater tank via the pump. When demand is placed on the header tank, water is gravity fed to the point of use. Should the rainwater in your tank reach a low level, the header tank will continue to be depleted until the level has reached the mains water top-up level. At this point, mains water is sent directly to the header tank.

As the pump is starting and stopping less frequently than in direct pressure systems, power consumption and life of the pump will be much better.

This system includes:

  • 8400 Litre twin neck polyethylene tank 
  • 2x pedestrian rated telescopic neck with lids
  • 82 Litre header tank
  • Push fit DN 100 drainage connections
  • Pre-fitted Compact filter with calming inlet
  • Submersible pump

8400 Litre Tank

The tank is manufactured in the UK from virgin Polyethylene and is used mainly for storing harvested rainwater, however it can also be used for storing water from other sources such as springs and wells.

The ribbed design provides added strength and allows for environmentally friendly pea-gravel backfills, eliminating the need for concrete bases and backfills to be used in most installations.

The tank has been designed to ensure optimal strength and is shorter in height compared to other tanks on the market today. This means that a shallower hole is needed to accommodate the tank (this can be as much as 500mm less).

The tank features a large 600mm access which allows for inspection and maintenance of the tank and its contents.

The telescopic neck and lid push fits into the neck of the tank and a rubber seal towards the bottom ensures a tight fit. The telescopic part of the neck can be extended by up to 300mm and can be tilted in any direction by up to 5 degrees.

In-Tank Filter

As standard, a compact filter is pre-installed into the neck of the tank. The filter removes leaves, grit and other debris from the rainwater passing through. The filter requires very little maintenance, usually about 3-4 times each year and is very quick and easy to clean with no consumables, just lift, rinse and replace.

The compact filter is suitable for roof areas up to 150m².

Submersible Pump and Controls

The pump delivers approximately 4 bar of pressure and up to 3500 litres/hr of flow and is automatically started at the point of use. The pump also has dry run protection as standard.

The pump is suspended from a pre-fitted hook in the neck of the tank by a stainless steel chain which allows the pump to be lifted out for maintenance. A large handle allows easy lifting when necessary.

Each system is supplied with the filter, calmed inlet and drainage connections pre-fitted inside the tank. Also supplied are all non-standard plumbing fittings, a roll of 32mm MDPE (15 metres), marker tape and ID packs.

Important Delivery Information

Please note the delivery price quoted is for delivery to an address in England or Wales. Deliveries to Scotland, Northern Ireland and offshore islands may incur a surcharge. Please contact us for additional delivery charges to any of these locations.

Delivery is made via a dedicated truck on a 3-5 working day standard service. It is recommended that the tank is off-loaded and moved only by machine and not manually handled.

Tank Specifications
Capacity - Litres 8400
Capacity - Gallons 1847
Construction Material Polyethylene
Length - mm 3970
Height - mm 1250
Width - mm 2700
Weight (kg) 390
Header Tank Specifications
Length - mm 615
Width - mm 460
Height - mm 480
Construction Material Polyethylene
Capacity - Litres 82
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