Rain Harvesting Clean Rain Ultra


SKU: DDCR01 Category:

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Clean Rain Ultra

Keep leaves, pests and contaminants out of your rainwater with this sleek, all-in-one rain head and first flush diverter.

Keep leaves and pests out

The Clean Rain Ultra keeps leaves and pests out of your downpipes so you can harvest better quality water. Leaf Slide “fingers” deflect larger leaves, while the patented, 955 micron Hydro Active Filtration™ screen keeps mosquitoes out and vibrates for maximum leaf shedding.

Keep nasty contaminants out

With its inbuilt, compact inline first flush diverter and Smart Sense® technology, the Clean Rain Ultra diverts the dirtiest, most contaminant-laden rainwater from your roof into stormwater so it doesn’t threaten the quality of the water in your tank.

Look great doing it

With the Clean Rain Ultra, achieving a stylish, integrated look couldn’t be easier. The Clean Rain Ultra’s rain head features a sleek cover and cap, the inbuilt first flush diverter doesn’t require an additional diversion chamber pipe, and the body swivels for convenient positioning.



  1. Remove 745mm of downpipe from where the Clean Rain® is to be situated. Ensure all edges
    are clean and smooth.
  2. Remove the cap and use snips to remove a section to fit the downpipe.
  3. Remove the cover by flexing outwards at the top.
  4. Fit the correct downpipe adaptor to the bottom of the Clean Rain®.
  5. Slide the cap up the top section of downpipe and hold temporarily in place.
  6. Install the Clean Rain® by positioning it securely on the bottom section of downpipe.
  7. Screw the top of the Clean Rain® in position through the screw slots provided. Ensure appropriate screws and anchors (if required) are used.
  8. Check the placement of the Vibrating Screen. It must sit behind and below the front face.
  9. Insert the Leaf Slide into slot holes.
  10. Re-install the front cover.
  11. Slide the cap back down the downpipe until it sits securely on top of the Clean Rain® unit.
  12. Fit the hose or pipe of your choice (20mm garden hose thread, 22mm greywater hose, 38mm pool hose or 90mm pipe) to the outlet.
    (a) For a garden hose, unscrew one or two caps and screw one or two garden hoses onto the outlet.
    (b) For a 22mm greywater hose and 38mm pool hose, unscrew the cap and push the hose onto the outlet.
    (c) For 90mm pipe, remove the outlet cap and cut off the hose fittings, then insert the cap into 90mm pipe and glue. Reinsert the cap into the Clean Rain outlet and swivel the Clean Rain body to direct the pipe towards your rainwater tank or where the rainwater is being diverted to.


How does the Clean Rain Smart Sense technology work?

Smart Sense technology utilises a series of hygroscopic washers. When exposed to water, these washers slowly expand, in turn activating the valve by pushing it upwards into the seat. Water is then diverted to the outlet.

How much water gets diverted?

Approximately 18-30 litres or 5-8 gallons will be diverted, depending upon a variety of factors. The main factors are flow rate and the period of time since the last downfall. However, several other factors such as rainfall intensity, ambient temperature, humidity and wind will all affect the exact diversion volume.

Can I adjust the diversion volume?

We do not recommend adjusting the diversion volume. The hygroscopic washers divert an appropriate volume of first flush.

My clean rain unit seems to be taking a long time to divert water to my tank. Why is this happening?

If the unit is new, this will most likely occur because the washers require several rainfalls to properly “bed in”. For the first few rainfalls, the washers will divert a greater volume of first flush water than normal. After several rainfall events the washers will be properly bedded and deliver consistent diversion volumes.

How long will my clean rain unit take to reset?

The resetting process is dependent upon a number of environmental factors. Ambient temperature, humidity, wind and location are all major factors in determining the resetting period. Under dry conditions with a moderate temperature, wind and humidity, the Clean Rain should completely reset within 24 to 72 hours.

My clean rain unit is not diverting any water – why is this happening?

There are a few quick steps to take to get your Clean Rain diverting again:

  1. Open up your Clean Rain
  2. Feel the hygroscopic washers to see if the they are dry
    Note: If they are not dry, they are expanded and working correctly
  3. Look around and check for standing water nearby
  4. If the washers are dry, check there is no debris which bonding the seal to the body – if it is bound together, gently pull the metal rod down to release it.
  5. If there is no debris there, and no obvious obstructions, take a photo and give us a call.
I switched my unit off and can’t turn it back on. Why is this happening?

If your clean rain unit has been turned off it will not be able to be turned back on again until the hygroscopic washers are dry and the system has reset. Frost, snow, mist and dew can all activate the hygroscopic washers, so a few days where none of these are present will be required before attempting to turn the unit back on. If this is not possible then removing the unit and storing it in a dry environment for 1-2 days should suffice for the unit to be switched on again. For replacement hygroscopic washers or further information please contact Blue Mountain Co ([email protected]).

Is my clean rain unit capable of handling freezing conditions?

Your Clean Rain has been manufactured using materials that are capable of withstanding freezing conditions. If freezing conditions are expected, we recommend turning your unit off via the switch and, if you have a Clean Rain Ultra, ensuring that the cover is in place.

There are 100mm/4″ connections yet only a 90mm/3″ outlet. How will the system handle a full-bore 10mm/4″ incoming flow?

The clean rain system has been optimised for 90mm/3″ pipe. Although the system will accommodate 100mm/4″ pipe it will not be able to deliver 100% diversion should a full-bore flow event happen. We are currently working on developing a system capable of handling a full-bore 100mm/4″ pipe flow.

Can I change the resetting period?

The easiest way to alter the resetting period is with the breather holes located in the section underneath the outlet (long horizontal indentations with small holes). To shorten the reset period, align the breather holes with any prevailing wind. To prolong the reset, simply turn the breather holes 90 degrees to the prevailing wind.
An alternative way to shorten the reset period is to remove the foam shroud surrounding the washers. It should be noted that by removing the foam shroud the diversion volume will also be decreased.

Not enough water is being diverted to my tank/barrel. How can I change this?

Your clean rain unit may require a diverter/flow efficiency cap. We have found that some products in the market do not have this piece. If you’re missing a diverter/flow efficiency cap, we can send this to you and provide instructions on fitting it. Look through the top of your Clean Rain to check if this cap is present. It’s a blue, disc-shaped part.


Rain Harvesting

Weight 4 kg
Dimensions 24 × 20 × 79 cm

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