The Clean Rain range combines a leaf-screening rain head with a first flush diverter in a single fitting, so instead of installing two separate devices there's one unit screening debris and diverting the dirtiest first water in one go. Blue Mountain Co sells two versions, and the choice between them comes down to finish and budget.
Clean Rain Advanced
The Clean Rain Advanced ($83.94) is the standard version: an all-in-one rainwater diverter combining a rain head and first flush diverter, suited to a tank, rain barrel, pool or garden inlet.
Clean Rain Ultra
The Clean Rain Ultra ($94.71) does the same job, with the listing specifically calling out an integrated cover and cap for a tidier, more finished look where the unit is visible. At roughly $11 more than the Advanced, the Ultra is the pick where the fitting is somewhere it'll be seen — near an entry, on a feature water tank — and the Advanced is the equally capable, lower-cost option where it's tucked away.
Keeping it running
Both units use the same hydroscopic washer set ($10.65, 46 washers per set) as a spare-parts item, so there's a straightforward maintenance path for either model without needing to replace the whole unit when a washer perishes.
Where this fits with first flush diverters
A Clean Rain unit does both jobs (leaf screening and first flush diversion) at the inlet point itself. It's a different approach from running a separate downpipe diverter plus a dedicated first flush diverter further down the line — the Clean Rain is the simpler, single-fitting option, while separate diverters give more flexibility and volume for a bigger or dirtier roof. See the full range in our Downpipe Diverters & Outlets collection, part of the wider Blue Mountain Co rainwater harvesting range.
Frequently Asked Questions
What's the actual difference between Clean Rain Ultra and Advanced?
Based on the current listings, the Ultra adds an integrated cover and cap for a tidier finish; both do the same core job of screening debris and diverting the first flush. The Ultra costs roughly $11 more.
Can I use one Clean Rain unit instead of a separate downpipe diverter and first flush diverter?
Yes, that's what it's designed for — it combines both functions in one fitting. A dedicated first flush diverter offers more diversion volume for larger or dirtier roofs.
What spare parts does a Clean Rain unit need over time?
The hydroscopic washer set is the documented spare part, shared across both the Ultra and Advanced models.
Can Clean Rain be used on a pool or garden feed, not just a tank?
Yes, the listing covers use on a tank, rain barrel, pool or garden inlet.