Products First Flush Washers - Red
First Flush Washers - Red
(Incl. GST)
The set of red slow-release valve washers for your First Flush Diverter, with hole sizes ranging from 1.25mm to 2.00mm. Red washers drain faster than the black set, so they're the right choice when you have a larger diversion chamber or want to perform first flush diversion more often. To replace, simply unscrew the black hose fitting at the end of your First Flush Diverter and swap in the new valve.
Features and benefits
Tune your drain rate
The set covers hole sizes from 1.25mm to 2.00mm. Larger holes drain more quickly, letting you tune the reset time between rainfalls to suit your chamber size and rainfall pattern.
Drain rates by hole size
In vertical installations, the 1.25mm hole drains around 28 litres per hour, 1.5mm around 35, 1.75mm around 50, and 2mm around 65. Horizontal installations drain at roughly half these speeds.
Easy to replace
Unscrew the black hose fitting at the end of your First Flush Diverter, swap in the new valve, and fit the washer with the side marked "TOP" facing up. Start with the smallest hole size and try a larger one if you experience blockages.
Suits larger diversion chambers
Faster drain rates make this set the right choice for larger First Flush diversion chambers, or where you want to perform first flush diversion more often.
Product Support resources
Frequently asked questions
What's the difference between the black and red first flush washers?
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