First Flush Delta Post/Wall

A high volume first flush diverter, designed specifically for mounting on a wall or any vertical structure.

The unique manifold design uses standard 100mm or 4" pipe to create a high capacity storage and diversion chamber for your first flush. Using these smaller pipe sizes makes it easier to source pipe and assemble the system, when compared to using large diameter pipe on traditional high volume diverters.

Divert Large volumes of water, easily

Divert Large volumes of water, easily

Easily divert large volumes of water with Delta's unique manifold design which only requires you to use smaller diameter pipe.
Ultimate First Flush control

Ultimate First Flush control

By setting the regularity of your first flush diversion, you can optimise how often your First Flush Diverter drains.
Catch-All Tee improves clean water yield

Catch-All Tee improves clean water yield

The Catch-All Tee ensures no water skips across the tee until the first flush of water is complete – which means you only capture the best quality water.
Easy Maintenance

Easy Maintenance

The large opening on the valve reduces the chance of clogging when compared to a traditional slow release valve.
Just add pipe

Just add pipe

The First Flush Delta In-Ground comes with all fittings you need to set the system up. Just add the pipe to create the storage chamber.
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First Flush Delta Post/Wall
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Benefits

Divert Large volumes of water, easily

Standard large format First Flush Diverters require you to use large diameter pipe (eg, 300mm / 12"). It can be difficult to source in smaller lengths and can be expensive.

The Delta's unique manifold design uses lengths of 100mm or 4" pipe instead, so sourcing the pipe to make the chamber is easier. It means you can assemble your First Flush Diverter quicker, to get the job done.

Each 1 meter of length in the Delta = 73 L diversion.
Each 1 yard of length in the Delta = 17.5 gal diversion.

Benefits

Ultimate First Flush control

By setting the regularity of your first flush diversion, you can optimise how often your First Flush Diverter drains.

Do you want the best quality water possible? Set it to a regular reset interval of three days or less.

Do you need to maximise the volume of water your capture? Increase the reset interval to two weeks or more.

Want to start off with a great compromise of water quality and quantity? Try five days.

Benefits

Catch-All Tee improves clean water yield

The Catch-All Tee ensures no water skips across the tee until the first flush of water is complete – which means you only capture the best quality water. The unique design incorporates a jump which makes it harder for dirty water to skip through. Standard tees can allow water to skip through at less than 1L/second. The Catch-All Tee won't let this happen, which means you only get clean water in your tank.

Benefits

Less maintenance and clogging

Traditional First Flush Diverter valves have a tendency to clog over time - they only have a tiny hole so it is inevitable. The release valve on the Delta First Flush includes a unique funnel design and a much larger draining hole, which means that water drains as it's supposed to and there is far less chance of the unit becoming clogged.

Benefits

Just add pipe

The First Flush Delta Post/Wall comes with all fittings you need to set the system up. Just add the pipe to create the storage chamber.

Benefits

Divert Large volumes of water, easily

Standard large format First Flush Diverters require you to use large diameter pipe (eg, 300mm / 12"). It can be difficult to source in smaller lengths and can be expensive.

The Delta's unique manifold design uses lengths of 100mm or 4" pipe instead, so sourcing the pipe to make the chamber is easier. It means you can assemble your First Flush Diverter quicker, to get the job done.

Each 1 meter of length in the Delta = 73 L diversion.
Each 1 yard of length in the Delta = 17.5 gal diversion.

Benefits

Ultimate First Flush control

By setting the regularity of your first flush diversion, you can optimise how often your First Flush Diverter drains.

Do you want the best quality water possible? Set it to a regular reset interval of three days or less.

Do you need to maximise the volume of water your capture? Increase the reset interval to two weeks or more.

Want to start off with a great compromise of water quality and quantity? Try five days.

Benefits

Catch-All Tee improves clean water yield

The Catch-All Tee ensures no water skips across the tee until the first flush of water is complete – which means you only capture the best quality water. The unique design incorporates a jump which makes it harder for dirty water to skip through. Standard tees can allow water to skip through at less than 1L/second. The Catch-All Tee won't let this happen, which means you only get clean water in your tank.

Benefits

Less maintenance and clogging

Traditional First Flush Diverter valves have a tendency to clog over time - they only have a tiny hole so it is inevitable. The release valve on the Delta First Flush includes a unique funnel design and a much larger draining hole, which means that water drains as it's supposed to and there is far less chance of the unit becoming clogged.

Benefits

Just add pipe

The First Flush Delta Post/Wall comes with all fittings you need to set the system up. Just add the pipe to create the storage chamber.

Product Installation, Maintenance and Information

Yes
Yes
Yes

Specifications

All measurements are in mm unless specified otherwise

Click the drawing to view it in full size

Pipe Fitment

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First Flush Calculator by Rain Harvesting

First Flush Calculator

Easily calculate how much water you need to divert and discover which First Flush Diverter is right for you.

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