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F-Line 3000 Litre Garden System

F-Line 3000 Litre Garden System

Flat Tank F-Line 3000 litre underground garden rainwater harvesting system kit. The unique F-Line flat shallow dig tank, supplied complete as a kit for use as a garden rainwater harvesting system. Collect, filter, store and pump cooled rainwater to your valuable garden plants. Mainland UK delivery included

More details...

£ 1,971.73

Tax excluded

Flat Tank F-Line 3000 litre, Complete System 1 underground KIT includes a 3000 litre shallow dig underground tank, inline filter and overflow kit, Hydroforce Series 3 pump and the accessories needed to deliver clean rainwater to a garden tap. Some standard external pipework and connectors will be needed but are not included in the kit as the location of the system will determine the amount of pipework required.

Why buy this system?

  • Our Rainwater Harvesting systems are based on the highest quality, rotationally moulded, one piece tanks, installed without the need for concrete, thereby minimising installation costs and supported by our long term 25 year tank guarantee.
  • Minimum installation depth
  • Easy and quick to install
  • Small excavation pit and little earth excavation preserves your garden
  • Ideal for installation in new or existing properties
  • Can be installed in ground water up to tank shoulder  

Easy to install

The F-line flat tank can be installed into much higher water tables than a standard round tank. If you don't know what your water table will be like in the winter, you're safer to install a flat tank. The F-Line tanks are flat and the installation depth is 60% less than other rainwater tanks. The excavation can be up to 70% less, meaning little earth excavation, easy handling and less cost for you! The small excavation pit is easily filled in and your garden will look just like it did before.


You get 25m of 25mm HDPE pipe with this kitExternal HDPE Rainwater Pipe included. It is important to identify a source of a water supply. Untreated rainwater is not for human consumption and so water companies are recommending (and in some cases requiring) that Black and Green HDPE pipe is used for piping rainwater from the tank to the point of use - eg. garden tap. The point of use should be clearly labelled to show that rain water is the source. We include 25mm black and green hdpe pipe and labels with this kit with the option to buy further rolls of pipe.

Our service.

At Rainwater Harvesting Ltd we provide a'' Complete Solution'' supplying everything specific to Rainwater Harvesting.* There are no hidden extras. We manufacture systems and pumps etc ourselves and hold everything in stock. Delivery is usually within 5 to 7 working days of ordering.

We provide a full time, fully trained technical help desk to answer any questions that the client, builders or plumbers may have before, during and after the install.

F-Line Tanks have a 25 year manufacturers warranty.
All other parts have a 2 year warranty.

Technical Details

Size 1500 3000 5000 7500
Weight Kg 80 170 250 310
Length 1200 2400 2960 3340
Width 2400 2400 2220 2310
Overall Height* 1015 - 1415 1015 - 1415 1350 - 1750 1415 - 1815

Ground to Invert**

320 - 720 320 - 720 345 - 745 310 - 710
Invert to Outlet 162 162 162 162


Size 1500 3000 5000 7500
Length 1600 2800 3360 3740
Width 2800 2800 2620 2710
Overall Height* 1115 - 1515 1115 - 1515 1450 - 1850 1515 - 1915

*Overall height allows for 100mm compacted aggregate

**Using a VS60 (635mm Shaft)

The overall height difference above is because up to 400mm can be cut off the 635mm shaft on site so as to achieve your exact invert level.

Which tank size for the garden irrigation?

Pure Garden irrigation (rough guide) Connected roof surface area> Tank size in litre
Up to approx. 100m2 garden area min 20m2 1000-1500
Up to approx. 300m2 garden area min 40 m2 2500-3000
Up to approx. 500m2 garden area min 70m2 3000-5000
Up to approx. 800m2 garden area min 90m2 5000-7500
Up to approx. 1000m2 garden area min 100m2 7500-10000

* Please note that the pump supplied with this system has a minimum operational throughput of 10 L / minute. If the flow drops below this then the pump will potentially hunt or go into dry run protection mode. If you are using for example a drip feed irrigation system or low flow devices with this pump then we recommend installing a pressure vessel.

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