WDDP20 First Flush w Catch All Tee and Electronic Valve
Installation Guide

PRODUCT DETAILS

The revolutionary First Flush w/ Catch-All Tee and Electronic Valve diverts more contaminants and gives you greater control over water volume.
The Electronic Release Valve allows you to precisely set how often you want to divert water so you can optimise the quality and quantity of water you catch in your tank.
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.

Installation

WHAT’S IN THE BOX?

• 100mm/4” Catch-All Tee
• Ball seat
• 100mm/4” socket reducer
• 100mm/4” pipe wall brackets x 2
• Sealing ball
• Transparent, Rapid Release Exit Fun Electronic Release Valve
• Primary Filter Screen

TOOLS/MATERIALS YOU MAY REQUIRE

• 100mm pipe (for diversion chamber)
• Tape measure
• Marker pen
• Saw
• Solvent weld glue
• Screws
• Drill or screwdriver
• 2 new 1.5 volt AAA batteries
• 2 100mmx90mm in pipe reducers (for 90mm pipe installations)

FIRST FLUSH W/ CATCH-ALL TEE AND ELECTRONIC VALVE

1. Determine the length of 100mm (4”) pipe required for your first flush diversion chamber. As a rough guide, 1 metre of 100mm pipe holds approximately 8.8 litres (3 feet of 4” pipe holds approximately 2 gallons) of water. Ensure all cut edges are clean and smooth.

2. The Catch-All Tee can be installed in the horizontal or vertical orientation to suit your installation. The outlet and Electronic Release valve must be accessible for maintenance and inspection. (Refer to Figures 1a, 1b and 1c for suggested installation orientations).
   Suggested Installation Orientations
   

3. Select the orientation of the Catch-All Tee appropriate for your chosen installation point. This will determine which socket on the Catch-All Tee will attach to your diversion chamber. (Example: if you’re installing your First Flush w/ Catch-All Tee and Electronic Valve into a horizontal pipe, the arrow marking the direction of water flow should be oriented in the direction of flow (see Figure 1c). For installations rainharvesting.com
   using tee in vertical positions, always ensure the arrow is pointed ‘up’ (see Figure 1a/1b).)

4. Orient the ball seat so it will fit inside the Catch-All Tee socket that will attach to your diversion chamber, then apply solvent weld glue and press it hard up inside the socket.

5. If you are attaching your First Flush w/ Catch-All Tee and Electronic Valve to existing 90mm downpipes, install both 100x90mm socket in pipe reducer into the remaining Catch-All Tee sockets. If you are attaching your First Flush w/ Catch-All Tee and Electronic Valve to existing 100mm downpipes, the reducers are not required.

6. Measure your existing downpipe and cut to create space for the Catch-All Tee. The outlet of your diverter must sit at least 150mm (5.9”) from the ground when fully assembled, so select your installation point and measure and cut accordingly. Ensure all cut edges are clean and smooth. Install your First Flush w/ Catch-All Tee and Electronic Valve T-junction in place by applying solvent weld glue to the sockets and pipe. Insert the pipe into the sockets or socket adaptors at either end of the Catch-All Tee.

7. Apply solvent weld glue to the end coupling socket and one end of your 100mm (4”) diversion chamber pipe and insert it firmly into the end coupling.

8. Apply solvent weld glue to the socket of the ball seat and the other end of your 100mm diversion chamber pipe then insert it firmly into the socket and against the ball seat.

9. Attach to the wall using the supplied brackets, supporting the unit until it is fully secured. The upper bracket should sit directly under the Catch-All Tee where it will hold the weight of the unit.

10. Place the ball inside your first flush chamber through the end coupling. Install the Primary Filter Screen, Transparent Rapid Release Exit Funnel, and Electronic Release valve by following the instructions in Figure 2.

Figure 2
Installing and setting up the Electronic Release Valve

2a – Insert the Primary Filter into the end of the
First Flush chamber. It should fit snuggly into the
socket on the end of the pipe.| 2b – Install the Transparent Rapid Release Exit
Funnel, ensuring the o-ring is seated correctly. It
should be screwed up firmly to compress the o-ring.

2c – Attach the Electronic Release valve by first installing the 25mm x 20mm (1” x 3/4”) reducing adaptor and washer to the 25mm (1”) thread of the screw cap.

2c – Remove the union from the valve and attach to the reducing adaptor with 20mm (3/4”) washer in place.

2e – Attach the valve at the union and orientate dial for easy access.

2f – Remove the waterproof cover from the Electronic Release Valve.

2g – Ensure the reset interval and drain time control knobs are in the “RESET” and “CLOSED” positions. Carefully slide out the battery box and install two new 1.5-volt AAA batteries.

2h – Test the unit by turning the drain time knob to the “OPEN” position. You should hear the sound of the motor within 5 seconds. Turn the drain time knob back to the “CLOSED” position ready for setting.
NOTE: If you do not hear the sound of the motor, check that the batteries are installed correctly.

2i – Ensure that the reset interval and drain time knobs are in the “RESET” and “CLOSED” positions.
NOTE: The first time you program the Electronic Release Valve it will not begin to operate until after a time delay equal to the setting of the reset interval knob you select. The Electronic Release Valve starts to keep time when you set it. It is important that you set the timer at the hour you want it to operate. For example, if you want the Electronic Release Valve to operate at 07:00AM, you must physically set it at 07:00AM.
Set your reset interval and drain time according to the tables below, then replace the waterproof cover. A long reset interval will mean that the first flush diversion chamber empties less frequently, leading to higher rainwater yield. A short reset interval will mean that the first flush diversion chamber empties more frequently, resulting in a lower water yield. It should be noted, however, that differences in yield are minimal, so set your reset interval as appropriate for the pollution in your area.
Electronic Release Valve Electronic Release Valve Reset and Drain Time Settings

DIVERSION CHAMBER SIZE
Determine the length of 100mm (4”) pipe required for your first flush diversion chamber. As a rough guide, 1 metre of 100mm pipe holds approximately 8.8 litres (3 feet of 4” pipe holds approximately 2 gallons) of water.

POLLUTION FACTORS

The following factors can be used as a guide to determining the volume of water to be diverted.
POLLUTION FACTOR FOR THE ROOF

MINIMAL POLLUTION
DIVERT 0.5L PER M²
(0.0125 GALLONS PER FT²
Open field, no trees, no bird droppings, clean environment| SUBSTANTIAL POLLUTION
DIVERT 2L PER M
(O.05 GALLONS PER FT ²
Leaves and debris, bird droppings, various animal matter, e.g. dead insects, skinks, etc.
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The above quantum are the results of preliminary testing. Individual site analysis and field testing is required to more accurately assess the quantum to be diverted in each individual case.
DIVERSION FACTOR FOR A FIRST FLUSH WATER DIVERTER

M (or FT ) ROOF AREA X POLLUTION FACTOR²

LITRES TO BE DIVERTED²
Example for a minimal polluted roof of 100m 100m x 0.5 = 50 litres to be diverted.
Example for a minimal polluted roof of 1000ft 1000ft x 0.0125 = 12.3 gallons to be diverted.| Example for a heavily polluted roof of 100m 100m x 2 = 200 litres to be diverted
Example for a heavily polluted roof of 1000ft 1000ft x 0.05 = 49.1 gallons to be diverted

REFERENCE CHART

1 In-feed from the roof
2 To the tank
3 Diverter Chamber
4 Sealing Ball
5 Catch All Tee
6 Chamber Inlet
7 Chamber Outlet| 8 Ball seat
9 Electronic Release Valve
10 Pipe/Wall Brackets
11 End Coupling
12 Transparent, Rapid Release Exit Funnel
13 25mm x 20mm reducing adaptor
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Product Specifications

First Flush w/ Catch-All Tee and Electronic Valve

All dimensions are in mm unless otherwise stated.
Fitting guide:
F = Female / Socket Fitting
M = Male / Spigot Fitting (Pipe size IP = In-Pipe Fitting

Maintenance

IIt’s important to ensure that your first flush diverter outlet remains clear of any debris. If your outlet become 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 diverter’s outlet, periodically check the transparent, rapid release exit funnel for any build-up of matter (Remove primary filter and clean if required).
Periodically check that the Electronic Release valve batteries have charge. This is indicated by the flashing light.
To protect your Electronic 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, we recommend installing rain heads such as our Leaf Eater redheads on all your downpipes to limit the volume and number of leaves and debris that reach your first flu diverter.

A common misconception about collecting rainwater is that all you need is a roof, a tank and some rain. This ‘tanking’ approach cannot always be relied on to deliver the volume or quality  of water that you require. That is where we can help.
With some thought, your rain harvesting system can provide you with cleaner water and lots of it. Whether you’re completely reliant on tank water or wanting to keep the garden green, our simple steps will help you achieve your goal.
The Rain Harvesting approach to rainwater collection involves using tested and proven products to make quality rainwater available for use in and around your property. You don’t need much to get started and you will be surprised how easy it is to get the most out of your rainwater system.

How can we help you?
DISCLAIMER This product specification is not a complete guide to product usage. Further information is available from Rain Harvesting Pty Ltd and from the Installation and Operating Instructions. This specification sheet must be read in conjunction with the Installation and Operating Instructions and all applicable statutory requirement. Product specifications may change without notice. © Rain Harvesting Pty Ltd

For more information or to find out
how we can help, just give us a call on
+61 7 3248 9600
Or visit our website at
rainharvesting.com

References

• Cleaner Water. More of it. | Rain Harvesting by BMCo US

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