1500 Litre F-Line Gravity Feed System

£2,410.00 ex VAT

F-Line Flat Tank 1500 litre rainwater harvesting system with Rain Director® DUK4. Combines the F-Line flat tank with the Rain Director so you can use rainwater to flush toilets, fill washing machines and water the garden. F-Line Flat Tank 1500 litres rainwater harvesting system for garden and domestic use with Rain Director®. Mainland UK delivery included

SKU: RWH-1599FL-DUK4 Category:


Our multi award winning low energy system, with the popular shallow dig F-Line tank for easy and cost effective installation.

Why buy this system?

  • High quality, one piece, shallow dig tank. No concrete required plus low installation depth minimises installation costs and supported by the manufacturers 25 year tank guarantee.
  • Award Winning Rain Director® low energy management system uses 6-8 times less energy than a typical direct pumped system.
  • Automatic mains override should the underground tank run dry.
  • Prolonged pump life due to reduction in cycling.
  • Silent operation.
  • Self cleaning filter reduces maintenance to a minimum.
  • High pressure, pumped rainwater for garden use.
  • Fully WRAS approved #1505033

Our Verdict: We believe this is the best, most economical Rainwater Harvesting system money can buy, coupled with the best tank.

Half your water bill with running costs less than 1p per person per day.

How does it work?

The Rain Director® pumps through a control unit, up to a “smart header tank” usually situated in a loft space. Inside the header tank are two level sensors, upper and lower. The system fills the header tank to the upper sensor then does not use the pump again until virtually all of the water is used and the lower sensor is reached. This “batch filling” process means the pump cycles 1-2 times per day, in comparison to every time a toilet is flushed with traditional systems.
Coupled with the large reduction in energy and pump wear, the Rain Director® has numerous benefits in comparison to others on the market.

  • Full mains override, providing water in every eventuality: Low rainwater, pump failure or powercut.
  • Smart user functionality.
  • Ensures water quality by cycling water in the header tank if no activity is registered within 72 hours.
  • 3 stage, electronic and physical overflow prevention system.
  • Cost effective and simple installation: push fit plumbing and image based installation guide.
  • Stylish and discreet control panel.
  • Fully WRAS approved. International Green Apple award winner, Waterwise approved, HBR Product innovation award winner.

Easy to install

Our F-line flat tank has become a customer favourite due to its simple and cost effective install. Up to 70% less excavation than an equivalent sized “deep dig” tank. Great for high water table areas or heavy clay when deep excavations cause unnecessary hassle and costs. All without the need for a costly concrete backfill.
Remember, these tanks are exceptionally strong: with an optional upgrade to vehicle loading shaft and steel lid for driveways etc.

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** 335 – 735 335 – 735 335 – 735 330 – 730
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.