Rainwater Bladder Accessories FAQs

The Leaf Eater Original features a dual screen system and is designed for vertical downpipe installation only. The Leaf Eater Advanced is a compact unit with VH Pivot outlet, allowing installation on both horizontal and vertical downpipes – ideal for small or awkward spaces. The Leaf Eater Ultra features Hydro Active Filtration™ with a vibrating screen and Leaf Slide "fingers" for high flow rates, plus a multi-fit cap and VH Pivot™ for maximum versatility.

Yes. All Leaf Eater models feature stainless steel mesh with a 0.955mm aperture, which is mosquito-proof while allowing optimal water flow.

All Leaf Eater models are available in 90mm and 100mm sizes. Part numbers: RHLE01/RHLE06 (Original), RHAD01/RHAD02 (Advanced), RHUL01/RHUL02 (Ultra).

The Leaf Eater Original is designed for vertical downpipes only. However, the Leaf Eater Advanced and Leaf Eater Ultra both feature VH Pivot outlets that can be adjusted for vertical or horizontal (rear outlet) downpipe installation.

The first flush of contaminated roof water enters the diverter chamber via a T junction. As the chamber fills, a ball rises until it seals the inlet. Cleaner subsequent rainwater then flows directly to your tank. A slow release valve automatically drains the chamber over time, resetting for the next rainfall event.

For areas with less pollution, divert approximately 0.5 litres per square metre. For 90mm diverters, use ~80mm pipe length per m². For 100mm diverters, use ~65mm per m². For higher pollution areas, divert 1-2 litres per m² – 90mm: ~160-320mm per m², 100mm: ~130-260mm per m².

WDDP01 (90mm) and WDDP02 (100mm).

In extreme rainfall, if stormwater infrastructure becomes blocked, dirty water can surge back through pipes towards your rainwater tank. An air gap creates a physical gap between your tank and stormwater lines, preventing backflow. Instead of entering your tank, contaminated water spills out the front of the air gap onto the ground.

The Air Gap is available in 90mm (TAAG01) and 100mm (TAAG02).

You can install your air gap at the top or bottom of the vertical overflow pipe. Installing it closer to the top generally makes it easier to maintain. Ensure you don't have a charged line which could affect installation height.

Check that the bayonet fitting is engaged correctly. Push and turn the top filter to secure the screen in place.

You can connect the downstream (bottom) side to a 100mm pipe using a 100×90 socket reducer. Please consult a licensed plumber for suitability in reducing the upstream (top) connection.

Overflowing rainwater from your tank can leak from the air gap if the bottom screen becomes dirty or obstructed. Regularly check and clean your bottom screen to prevent this issue.

HSJ370 (0.5 HP, 55 L/min) is ideal for small households or light irrigation. HSJ550 (0.75 HP, 70 L/min) suits medium households and rainwater tanks. HSJ750 (1 HP, 80 L/min) works for large households and pressure boosting. HSJ1000 (1.5 HP, 85 L/min) is best for high demand or commercial applications.

Yes. The HSJ Series has an AS4020 potable water certificate, making it compatible with household water supply applications, including drinking water.

Yes. The Hyjet HSJ Series pump is fully compatible with Fleximake Rainwater Bladders. A pump is required to be connected to the outlet pipe of your rainwater bladder to provide the necessary pressure to integrate with your water system. The HSJ Series pumps are an excellent choice for this application, featuring stainless steel construction, AS4020 potable water certification, automatic pressure controller, and run dry protection. Fleximake can supply the appropriate HSJ pump model with your rainwater bladder order based on your required head and flow.

Please note: As the inlet/outlet of the pump is 1" (25mm), the Rainwater Bladder outlet size must be selected as 25mm to ensure proper connection.

Small household / light irrigation	HSJ370 (0.5 HP, 55 L/min)
Medium household / standard rainwater tank set	HSJ550 (0.75 HP, 70 L/min)
Large household / pressure boosting	HSJ750 (1 HP, 80 L/min)
High demand / commercial	HSJ1000 (1.5 HP, 85 L/min)

Yes, all HSJ Series pumps feature run dry protection to prevent pump damage if the water supply is interrupted.

Rain/Main changeover automatically switches to mains water supply if your rainwater bladder is empty. Pumps for household water supply typically include this feature. Pumps used only for irrigation may not require it.

All HSJ Series models have a maximum suction lift of 8 metres.

For products connected to household plumbing or stormwater systems, we recommend consulting a licensed plumber to ensure compliance with local regulations and proper installation.

Inspect and clean your leaf eater and screens every 3-6 months, or more frequently if you have overhanging trees or heavy debris. The removable screens make cleaning quick and easy.

Yes. All these products are compatible with rainwater bladder tanks, above-ground tanks, and below-ground tanks. Fleximake can supply the appropriate accessories with your bladder tank order.

Yes. Fleximake can supply a range of rainwater harvesting accessories including Leaf Eater products, First Flush Diverters, Air Gap backflow prevention devices, and Hyjet pumps with your rainwater bladder tank order. When placing your order, simply contact the Fleximake team to confirm availability – Contact us.