Easily divert large volumes of first flush with the Delta High Volume Chamber. Using multiple 100mm pipes to create the diversion chamber, the Delta’s revolutionary design makes installation simple. The Delta chamber is customizable up to 2 metres. Every 1m of Delta chamber = 73 litres of diversion.
For larger volumes, consider the Delta manifold installation configurations.
This unique design ensure that the first flush ball remains close to the seat, even in high flow events, ensuring the diverter seals as soon as the chamber is full. No more lost balls when cleaning your outlet either!
By allowing you to determine the frequency of first flush, the Advanced Release Valve ensures that the Delta’s first flush diversion is optimized. The transparent, rapid release exit funnel reduces build up and blockages while allowing for easy
First Flush diverters help you plan for volume by allowing you to choose your catchment volume with custom catchment size and/ or an advanced release valve.
First Flush Diverters help divert the first flush, through their design. They are installed using a T junction or high flow inlet to which the diversion chamber is fitted. As the chamber fills with the initial dirty water from your roof, a ball rises until it seals the inlet, allowing the rest of your rainwater, which is much cleaner, to flow directly to your tank.
NOTE: Some vertical tee installations may require extra 150mm/225mm fittings depending on project requirements (see Figure 1 for suggested installation locations).
The outlet and Advanced Release Valve must also be accessible for maintenance and inspection.
Suggested Installation Orientations
NOTE: It is critical that all the Chamber Pipes are exactly equal length. It is also recommended to apply a small chamfer to the outside ends of the 6 Chamber Pipes to improve ease of insertion into the Chamber Sockets.
NOTE: Refer to solvent weld glue manufacturers specifications and curing times. All sockets of the Delta End Cap are stepped internally. The inner socket is for use with 100mm UPVC pipe and the outer socket for 4” SCH40 pipe. Only apply solvent weld glue to the socket relating to the pipe in use.
Delta Post/Wall Inlet/Outlet Positions
NOTE: Refer to solvent weld glue manufacturers specifications and curing times.
Inserting the Cage/Seat and Ball
CAUTION: Failure to support the unit in the upright position while attaching the upper bracket could crack the bottom Chamber End Cap.
NOTE: Ensure the Tapered Reducer is orientated correctly to suit your installation e.g. so that the back of the 100mm socket/pipe is flush against the wall to align with the inlet of the Delta End Cap.
It’s important to ensure that your first flush diverter outlet remains clear of any debris. If your outlet becomes blocked, the chamber will not empty and the first flush of water will not be diverted when it rains.
To ensure the flow of water out through your Advanced Release Valve, periodically remove from the Transparent Rapid Release Exit Funnel to check for any build-up of matter. Remove primary filter plus ball, and clean if required.
Periodically check that the Advanced Release Valve batteries have charge. This is indicated by the flashing light.
To protect your Advanced Release Valve from freezing or “winterising”, remove the timer prior to the first frost or freeze and store it indoors until spring. Remember to remove the batteries from the battery compartment.
For best results and minimal maintenance, rain heads with 0.955mm aperture mesh such as Leaf Eater Rain Heads
must be installed upstream of the Delta First Flush to limit the entry of debris that can reach your diverter.