Maelstrom Filter

Maelstrom’s advanced design combines super-fine filtration and super-high water catchment efficiency to give you cleaner rainwater and more of it.


Get cleaner water in your tank
Maelstrom On-Tank’s ultra-fine secondary filter removes particles down to 180 microns – 5 times finer than standard rain heads and pre-tank filters. This gives you cleaner, better quality water and lowers the volume of sediment putting pressure on your tank pumps and post-tank filters.

Get more water, faster
Maelstrom On-Tank eliminates the problem of water splashing off your tank inlet screen, especially at high flow rates. Its phenomenal water catchment efficiency (96% at 3,600 litres/hour in wet systems) gives you more water, faster, so you can take full advantage of every raindrop.

Get water effortlessly
Maelstrom On-Tank’s initial 2mm filter diverts leaves and debris which are then flushed out during rainfall events. Because the revolutionary design is low-maintenance with no mechanical parts, it does this with minimal effort from you.

See How it Works


A Rain Head designed to blend into the architecture of your home.


Rain heads are debris filtration devices.  They are an ideal filter to install prior to the tank, and can be fitted to each downspout.  Rain heads are designed to keep leaves and debris out of downspouts, improve tank water quality and reduce maintenance plus ensure water entering your downspouts is mosquito and vermin proof.  They will also help prevent backflow of water into gutters and eaves.

Slimline features:

  • Slim design to blend into your home
  • Red overflow indicator shows when maintenance is required
  • High flow rate filtration
  • Removable filter body for easy cleaning
  • Suits 3 inch downspout and designed to fit neatly on a post
  • Mosquito proof screen (0.955mm stainless steel)


Tank Screen Covers

The Rain Harvesting Tank Screen Covers prevent light entry into the tank and help keep debris off the tank screen.
Light will stimulate the growth of algae in stored water and therefore it is necessary to exclude as much light as possible from the interior of the tank to minimise algal growth.

Next Generation Hose Meter



Compact and easy to use, the Next Generation Hose Meter allows you to monitor the volume of water you are using outdoors.

• Attaches to your outdoor faucet, no fittings required.
• Can be connected to a trigger nozzle*.
• Shows current and accumulated volume of water used.
• Can be used for up to 999 gallons before resetting.
• Save battery mode.
• Batteries included.

*Additional fittings required



Canale Adaptor

Canale Adaptor

Canale Adaptor allows efficient collection of rainwater from canales into downspouts even in windy conditions.  This downspout adaptor directs rainwater from the roof safely into a 3″ or 4″ piped system.

Rain Alert

Safe and easy tank level monitoring

The Rain Alert is a wireless measurement device that allows you to monitor the level of your tank/s from the comfort of your own home.

A Transmitter fits to the top of your tank/s and a Receiver is plugged into a power point at a convenient location, such as the kitchen, bathroom, garage or shed.

Features and Benefits

  • Safe and easy tank level monitoring
  • Tank level is continuously displayed on a small LCD panel on a receiver which can be located up to 656 feet away from the tank
  • Early warning indicator
  • Suitable for all vented tanks up to 118 inches in height
  • Quick and easy to install
  • Low voltage long life lithium battery fitted in the transmitter



Tank Gauge

Monitoring your rainwater made easy

The Rain Harvesting Tank Gauge is a rainwater tank level indicator that ensures you are able to tell how much water is in your tank at a glance.

Features and Benefits

  • Quick and easy to install – simple DIY product
  • Seals directly to the tank
  • Suitable for all existing and new tanks
  • No batteries or wiring required
  • Easy to read dial face with ‘Empty’ and ‘Full’ indicators
  • Empty and Full indicators allow for a more meaningful measurement than a numbered dial (due to different rainwater tank widths and styles)
  • Requires a standard 1.3″ hole saw
  • Low maintenance requirements
  • UV resistant
  • Suitable for all vented tanks up to (100 inches in height)
  • Able to be securely installed on a wide variety of tank shapes (dome-topped, flat, peaked)
  • Utilises a reliable float system

Installation Instructions

Before installing your Tank Gauge it is important to calibrate it for use. This will allow you to set your own tanks Empty and Full positions and quickly see your tanks water level.


1.  Carefully remove the front clear face from the Tank Gauge to enable
access to the moveable Empty and Full indicators.
2.  Select an installation site on your tank for the Tank Gauge and mark
it. It is preferable that this is a flat area and that once installed, will
allow you to view the Tank Gauge face easily.
3.  Whilst maintaining the same height and keeping the weight outside of
the tank, extend the weight so it is level with the bottom of your tank.
Move the red Empty indicator to where the water level indicator is
4.  Lift the weight so it is level with the overflow on your tank and move
the green Full indicator to where the water level indicator is pointing.
5.  Tank Gauge is now calibrated. Replace the front clear face.


1.  Drill a 1.3″ hole into your tank at the previously marked installation
2.  Lower the weight through this hole and sit the Tank Gauge on your
3.  Using the supplied screws secure the Tank Gauge to your tank.
4.  Your Tank Gauge is now installed and ready for use.

Wireless Tank Gauge


The Rain Harvesting Wireless Tank Gauge is a rainwater tank/cistern level indicator that ensures you are able to tell how much water is in your tank/cistern at a glance from within your home or office.


Features and Benefits

  • Simple set up
  • Transmits signals wirelessly to the receiver up to 328ft/100 metres away
  • Tank level working range of +/-5%, due to the use of a solid float system
    – Utlises a reliable solid float system that does not rely on ultrasonic beams
    – Will not interfere or snag on any internal components
  • Easy to read dial face with ‘Empty’ and ‘Full’ indicators
  • Suitable for all vented tanks up to 9.8ft/3 metres tall
  • Requires a standard 35mm hole saw
  • 4 x AAA batteries required
  • FCC ID – PS4TAWG01

Watch the Installation Video


Watch the Installation Video

Rainwater Diverter

Simple and easy way to collect rainwater

Features and Benefits

  • Simple and innovative D.I.Y. downspout diverter
  • Quick and easy to install
  • Only 1 small hole in your downspout required (hole saw included)
  • Ideal for use with rain barrels, lawns, gardens and pools
  • Suits a standard garden or grey water hose
  • Safety Overflow to protect gutters from overflowing
  • Easily removed if not required
  • Fits all 3″ or 4″ round downspouts



Gain Rain Gutter Diverter


The Gain Rain® is the simple way to collect more rainwater. Easy to use, it is designed to fit into the inside of a downspout, it creates a diversion dam directing water away from downspouts not connected to storage. This allows the maximum flow of rainwater to be directed to rainwater tanks/cisterns or diverters. In the event of high rainfall, water overflows through the centre of the downspout.

Features and Benefits

  • Simple alternative to plumbing downspouts to your rainwater tank/cistern
  • Quick and easy to install – simple DIY product
  • Ideal for use with rainwater tanks/cisterns and rainwater diverters
  • Safety overflow – to protect gutters from overflowing
  • Anti-pooling feature – no risk of mosquitoes breeding
  • Anti-drop feature – no risk of Gain Rain falling into downspout
  • Available in 3″ Round
  • Twin pack



Installation Instructions

Before installing ensure:
• Safe access to Gutter Outlets; and
• Gutters Outlets are free from debris

1.  Ensure the ‘TOP’ is facing upwards.
2.  Lower Gain Rain® into the Gutter Outlet until the locating pins rest on
the top face of the Gutter Outlet.

In the event of high rainfall and the gutter filling, water will overflow through the center of the Gain Rain®.