F-Line Tank Capacity's

Submersible Pump Submersible Pump Submersible Pump Submersible Pump Submersible Pump

Rain Backup® in a Box mains top up device

Calmed Inlet prevents sediment from being stirred up keeping water clean and clear

Rewatec McClean Self Cleaning Filter

25 meters of 25mm HDPE rainwater pipe included as specified by all waterboards

HydroForce™ Series 3 submersible pump

F-Line Tank Direct Feed System

Our Rain Backup® in a Box Direct Feed system is an easy and cost effective solution offering rainwater for domestic use, ideal for flushing toilets and washing machines as well as garden irrigation and other outdoor uses including car washing by simply capturing all of the rainwater from your roof area.

System includes:

  • F-Line Flat Tank offers optimum use of the tank volume with the introduction of a pump basin. Due to it’s flat construction an installation depth of up to 60% less than other tank types can be achieved, the F-Line Flat Tank is quick and easy to install as well as offering low installation costs. All F-Line Flat Tanks are weight tested to 10 tonnes (equivalent to 1.44m of earth) and come with a 25 year guarantee.

  • McClean Intergrated Fine Filter comes pre fitted to the F-Line Tank, providing 95% water yield with a fine filter mesh of only 0.8mm. The filter cartridge is easily removed for maintenance and cleaning. The filter also comes with pre attached overflow siphon that simply flushes away any light materials such as pollen, which can form a floating layer via two exit slits when the tank overflows.

  • HydroForce™ Series 3 Submersible Pump is a British manufactured twin chamber design with alloy bulkhead, and features a self controlling pressure switch, non return valve and dry run protection. The HydroForce™ Series 3 can produce up to 3.5 bar of pressure and deliver over 2500 litres per hour with a power usage of 800 watts at 220-240v AC and comes supplied with a stainless steel strainer and a 10 metre cable.

  • Rain Backup in a Box® designed and built by RainWater Harvesting Ltd this clever little device is an easy and simple way of introducing a small amount of mains water to your underground tank when rainwater has ran out. Measuring just 370mm wide, 270mm tall and 100mm deep the Rain Backup® in a Box is easily mounted indoors. Operation is achieved via a float switch within the underground tank sending a signal to a 12v electrically activated solenoid valve within the Rain Backup® in a Box this unit also complies with U.K. Building Regulations by means of an appropriate air gap.


  • Shallow dig tank for easy and cost effective installation.
  • Full domestic system for toilets, washing machines and garden use.
  • Automatic Mains water Backup system included for times of drought.
  • Automatic pressure sensitive HydroForce™ pump included.
  • Everything included to run a full system.

Size* Length Width Height
(tank body)
(inc. entrance shaft)
Weight Inflow** Overflow
1,500 ltr 2400mm 1200mm 650mm 1015mm 80kg 330mm 385mm
3,000 ltr 2400mm 2400mm 650mm 1015mm 170kg 330mm 385mm
5,000 ltr 2960mm 2220mm 955mm 1350mm 250kg 335mm 385mm
7,500 ltr 3340mm 2310mm 1125mm 1415mm 310kg 325mm 375mm

* The useable volume can deviate according to connection variation approx. 10% from the nominal volume
** Top edge shaft extension including lid to invert level

RainWaterHarvesting Ltd is the UK’s largest stockist of Rainwater Harvesting tanks and as such can offer competitive prices for trade and commercial sales.

RainWaterHarvesting Ltd are also experienced in dealing with multi-dwelling and housing developments requiring multiple installation of rainwater harvesting tanks, and can give advice on meeting required Code levels, planning stipulations and flood attenuation issues.

Call us now on 01733 405111 for more information, or visit our store