Rain Harvesting Systems

Safer solutions for rainwater collection

Rainwater Solutions
Marley Rain Harvesting Products; safer solutions for
the collection, storage and distribution of rain water.
HOW SAFE IS THE WATER YOU ARE COLLECTING? 7 STEPS TO RAIN HARVESTING POTABLE WATER;
When collecting rainwater as a partial or total source for a water 1. Ensure the roof surface is suitable for collecting potable water
supply it is essential the design of the system meets the need for
2. Ensure spouting is installed according to Building Code,
potable (safe drinking) water.
allowing for adequate fall and installing suitable expansion
Water collected from a roof and stored and distributed from a outlets or gutter outlets to make certain water does not pond
water tank, can contain a nasty range of pollutants that can in the gutter
contaminate your water, for example bacteria from bird droppings,
3. Install debris diverter rainheads with screens to direct leaf
insects, rotting debris, airborne dusts (containing heavy metals).
litter and larger debris items out of the flow of the water
The Marley Rain Harvesting System comprises of a number of
4. Fit an appropriate sized first flush diverter, to divert the first
unique and cost effective components that are designed to work
most contaminated rain water from entering the tank
with the Marley PVC range of spouting and downpipes to help
make tank water as clean as possible. However, it is advisable to 5. Attach tank overflows and vent flaps to tanks to ensure the
have your tank water analysed to check its potability. tank is vented properly allowing air to circulate

6. Attach insect screens to rainheads and tanks to prevent

insects and vermin entering the tank

7. To assist in cleaning the tank, install a tank vacuum kit to

suck water from the bottom of the tank (anaerobic zone –
dirty ‘zone’) when the tank is full to overflowing.
RAIN HARVESTING SYSTEM COMPONENTS

Leafslide Rainhead 50mm diameter 90mm diameter, 50mm diameter Vent

PVC Insect Proof Flap Female Gutter Outlet Cowl PVC & S/Steel
Valve Insect Proof Screen
Code: RWLS Code: RH8118-4 Code: RH8118-5 Code: RH8119-9

Leaf Beater Rain 90mm diameter Insect 100mm diameter 100mm diameter Vent
Head 80/90mm Proof, Vented Flap Valve Gutter Outlet Cowl PVC & S/Steel
Dual Fit PVC/Stainless Steel Insect Proof Screen
Code: RH8120 Code: RH8119-3 Code: RH8118-6 Code: RH8119-2

Leaf Catcher Rain 100mm diameter Insect 100 x 50mm 90mm Tank Vacuum Kit -
Head 90/100mm Proof, Vented Flap Valve rectangular Gutter Poly/F-Glass/Flat wall Tank
Code: RHFWTV90
Dual Fit PVC/Stainless Steel Outlet Concrete Tanks
Code: RH8117 Code: RH8119-3-100V Code: RH8153 Code: RHCONTV90

Leaf Eater Rain Head 90mm Tank 90mm diameter Downpipe Diverter
80/90mm Corrugated Overflow Gutter Outlets for
Outlet HALF ROUND Gutters
Code: RH8119 Code: RH8123 Code: RH8118-9 Code: RWDD

90/100mm Dual Fit First 90mm 304 Stainless Flanged Tank Overflow 100mm Roof Outlet
Flush Water Diverter Post Steel M&F Insect Proof Outlet 90mm X 90 Code: RV369
or Wall KIT (Kit only add 300 Screen (Fits RH8123,
diam pipe to suit volume required) RH8124-1, RH 8124-2) degree bend M&F 150mm Roof Outlet
Code: RH8121-1 Code: RH8116 Code: RH8124-1 Code: RV482

90mm First Flush 90mm diameter, Plain Tank Overflow Outlet Strainer
Water Diverter - Male Gutter Outlet Outlet 90mm X 90
Downpipe degree bend M&F
Code: RH8119-5 Code: RH8124 Code: RH8124-2 Code: RWST
 SYSTEM DESIGN

Choosing the most suitable components for a rain harvesting system will be based upon
whether the tank is set up as a wet or dry system.
A TYPICAL “WET” SYSTEM (syphonic system)
A “Wet” System is a system where the pipes are fitted in such a way that when the rain stops the pipes to the tank do not drain out. They hold
water. With this type of system, the pipes must be fitted with screens at each end to ensure that insects cannot enter and breed in the system.
A “wet” system needs to be fitted with a First Flush Water Diverter at the tank, with a capacity equal to that of the pipes plus whatever amount
is to be diverted from the roof. To lessen the amount of water to be diverted at the tank, a Downpipe First Flush Water Diverter can be fitted on
the building to take the required first flush from the roof.

Fit Gutter Outlets or Fit Roof Gutters Dual Seal Vented Insect Proof Flap Valve to prevent
Expansion Outlets with appropriate fall mosquitoes from breeding in the “wet“ system
Leaf Eater Rainhead with
Insect Proof Secondary First Flush Water 955 Micron Tank Screen
Screen to downpipes. Diverter Tank,
post or ground Dual Seal Vented Insect Proof Flap Valve to the
Underground pipes hold water mounted of Tank Overflow (drawing from the anaerobic zone)
continuously and never dry correct size
out. Mosquitoes will breed in
Water Storage Tank
the water pipe system if each
opening is not protected with Aerobic Zone
Draw the potable water from the aerobic zone
a 1mm aperture screen.
Anaerobic Zone
Ground Level
Drainage Point (90mm T screw cap)

A TYPICAL “DRY” SYSTEM

A “Dry” System is a system where the pipes drain out and dry out after rain. A system where pipes do not hold water after the rain stops. Large
buildings normally make it near impossible to have “dry” systems. For slightly sloping sites an In-Ground First Flush Water Diverter will turn a
“wet” system into a “dry” system.

Fit Gutter Outlets or Fit Roof Gutters with

Expansion Outlets appropriate fall

Leaf Beater, Leaf Eater or

Leaf Catcher Rainhead 955 Micron Tank Screen

Fit Dual Seal Vented Insect Proof Flap Valve to the Tank Overflow.
Insect Proof all openings (drawing from the anaerobic zone)

Select
appropriate Water Storage Tank
Water Diverter
Aerobic Zone
Option Draw the potable water from the aerobic zone
Anaerobic Zone
Ground Level

A TYPICAL “WET” SYSTEM CONVERTED TO A “DRY” SYSTEM

For slightly sloping sites an In-Ground First Flush Water Diverter will turn a “wet” system into a “dry” system.

Fit Gutter Outlets or Fit Roof Gutters

Expansion Outlets with appropriate fall

Leaf Beater, Leaf Eater or

Leaf Catcher Rainhead Insect Proof 955 Micron Tank Screen
all openings
Dual Seal Vented Insect Proof Flap Valve to the Tank
Insect Proof
Overflow (drawing from the anaerobic zone)
all openings
Water Storage Tank
Aerobic Zone Draw the potable water from the aerobic zone

Anaerobic Zone
Ground Level

In-ground First Flush Water Diverter

Regular maintenance is extremely important. Clean rainhead and filter screens. Check to ensure that all insect proofing is in place and is
effective. Check that the roof is free from overhanging branches and that there are no snags in the roof gutter.
 Rain Harvesting Syste
Safer s
1 Spouting & Downpipes
Marley spouting systems and downpipes are
key components in a Rain Harvesting
System. Fit roof gutters and downpipes
in compliance with Building Code E1
and Marley installation instructions.
Ensure adequate fall is provided for
and the correct number of downpipes
are installed. Marley PVC spouting and
downpipes do not rust, therefore metal
contaminants from the gutter do not
end up in water storage tank.

2 Leaf Diverters
Leaf and debris diversion rainheads should
be fitted where water is captured
for storage in tanks or as a debris
removing device in urban areas.
As the water flows from a gutter
it brings the small pieces of debris 1 4
with it. As water washes over
the angle screen of the leaf diversion
system the debris is forced away and
2
the water continues through the screen.

Code: RH8120, RH8117, RH8119, RWLS

3 Downpipe Diverter
The Marley Downpipe Diverter can be
installed easily to PVC downpipes
allowing collection of fresh rainwater
for tank filling, garden watering,
3
aquariums etc. to reduce dependance
on town supply.
Code: RWDD

4 Expansion Outlets &

Gutter Outlets
Use Marley expansion outlets and
gutter outlets to ensure gutters
drain out fully after rainfall stops.
Where a building has Marley spouting
the use of Marley expansion outlets is
recommended.
Code: MC8.65, MC8.80, MC8.100, MS8.65, MS8.80,
MS8.100, MF8.65S, MF8.80S, MF8.100S, RH8124,
RH8118-5, RH8118-6, RH8153, 8118-9
ems
solutions for rainwater collection.
5 First Flush Diverter
The First Flush Diverter reduces
pollution of tank water by diverting
the first flush of contaminated
water away from the tank. There are
no mechanical parts, nothing to
wear out, its innovative and cost
saving.
Code: RH8121-1, RH8119-5

6 Vent Cowl
Reduces the possibility of
pressurising inside the tank allowing
a flow of fresh air into the tank, so
the water can breathe. The stainless
mesh ensures the tank water is
protected from insects and vermin.
Code: RH8119-9, RH8119-2

7 Flap Valves & Tank

Overflow
6 Fitting insect proof flap valves and
tank overflows to a storage tank
7 ensures the tank is vented allowing
air to circulate while protecting it
5 from insects, vermin and other
contaminants.
Flap Valve Code: RH8118-4, RH8119-3,
RH8119-3-100V,
Corrugated Tank Overflow Code: RH8123

8 8 Tank Vacuum Kit

By fitting a Tank Vacuum Kit, when
the tank fills up the overflow will be
sucked from the bottom of the tank
(from the “Anaerobic Zone” - dirty
zone). Fine sediment which can
contain harmful bacteria and heavy
metals, eventually builds up in the
bottom of the tank. Some finds its
way out the outtake pipe and into
the home and is ingested.
Code: RHFWTV90 (Poly/F-glass/Flat tanks),
RHCONTV90 (Concrete tanks)
FIRST FLUSH DIVERTERS

Water diversion is a key component to water

First flush of contaminated water is Once chamber is full fresh water
quality. The main function of the first flush diverted into chamber flows to tank
diverter is to prevent the first flow of water
from the roof from entering the water Water flow To tank
from roof
storage tank. Ball seals
chamber off
When it begins to rain, the first flow of contaminated water is
diverted into the diverter chamber. Once the chamber is full, the
fresh water automatically flows into the storage tank.

The type of first flush diverter to be fitted should be chosen by

assessing the quantity of water to be diverted.

FIRST FLUSH DIVERTERS Step 3 - Attach the wall/post bracket in position.

Place the diverter chamber into the bracket and secure the
90/100MM DUAL FIT FIRST FLUSH DIVERTER chamber to the wall at the top with a 100mm pipe bracket.
– WALL MOUNTED OR FITTED UNDERGROUND Step 4 - Connecting to the Chamber Inlet
Can be installed to a new or existing downpipe
If connecting to 90mm pipe; insert the ball seat with the small
system.
end (seat) down into the top of the chamber inlet and insert the
Add the appropriate length of 300mm diameter infeed pipe directly hard down on the diverter seat.
pipe to suit the quantity of water you wish to If connecting to a 100mm pipe: Insert the ball seat with the small
divert (see table below). end (seat) down into the top of the chamber inlet and insert and
Calculation Method: m Roof Area x Pollution Factor x 1000 +
2 glue the 20mm (long) 90mm spacer (provided) and push the
(length of wet pipe m x pipe cross section factor) = litres to be diverted spacer hard down on top of the seat to hold it in place. Attach the

Pipe Allowance 100mm infeed pipe.

Pipe Size Pipe Cross Section Factor Step 5 - Connecting to the Chamber Outlet
RP65 3.30
Glue the 100mm long 90mm diameter pipe provided into the plain end
RP80 4.40
of the 90mm threaded coupling From Roof Gutter
90SW 5.75
and glue into the chamber outlet.
Pollution Factor 0.0005 Minimal Pollution; open field
Pollution Factor 0.0020 Substantial Pollution; leaves, debris, bird droppings,
various insect matter. Pipe Bracket
Ball Seat
PRODUCT CODE DESCRIPTION VOLUME IN LITRES
Chamber Inlet
CHR.300.1 300mm x 1metre 80 Litres
Sealing Ball
CHR.300.1.5 300mm x 1.5metre 120 Litres
Water Level
CHR.300.2 300mm x 2metre 160 Litres
CHR.300.3 300mm x 3metre 240 Litres Diverter Chamber

Installation instructions
Step 1 - Determine the length of the Diverter Chamber (see table
above). Make sure the Screw Cap is at least 150mm from the Chamber Outlet
ground to allow for cleaning.
Diverter Chamber
Step 2 - Bevel both ends of the 300mm pipe with an angle grinder
Stainless Steel
so that the pipe fits easily onto the end caps. Filter Screen
Plastic Filter
For Post/Wall mounting glue (Marley Gold) the caps on each of the Screen
chamber making sure the cap outlets are both at 12 o’clock. Socket
O’Ring Seal
150mm Clearance
For an underground unit (horizontal) glue one cap at 12 o’clock Nut and Tail
Required
and the other at 6 o’clock. Flow Control Valve
 FIRST FLUSH DIVERTERS

Insert the Stainless Steel filter into the socket with the open end Step 2 - Place the Ball Seat into the Tee Junction and then fit the
of the filter facing downwards, insert the 20mm (long) 90mm pipe Diverter Chamber up against the Ball Seat and hold until the glue
(spacer) into the socket to hold the filter in place. sets. Then fit the socket to the bottom end of the Diverter Chamber.

Fit the Screw cap to the socket making sure that the “O” Ring is in Step 3 - Fix the assembled chamber to the wall in the desired
place in the cap. Insert the plastic screen into the cap, select the position using the steel Pipe Brackets.
appropriate Flow Control Valve (rubber seal with holes) with the
Step 4 - For wall mounting, connect a M & F Elbow to the Diverter
smallest hole giving slowest flow. Place Flow Control Valve in the
Chamber and connect the downpipe. Bracket if necessary. Fit an
Nut and Tail and screw the Nut and Tail into the cap.
elbow to the Tee Junction inlet and connect to the bottom of the
To install the unit underground, ensure that before Chamber Inlets selected Leaf Diverter.
and Outlets are glued to the Chamber, the Chamber Inlet is at
Step 5 - Place the Sealing Ball into the Diverter Chamber and
12 O’clock and the Chamber Outlet at 6 O’clock to ensure water
attach the Screw Cap.
can drain out effectively.
Step 6 - Select the appropriate Flow Control Valve and insert into
Hint: Make sure diverter water flows away from house or tank.
the Nut and Tail. Insert plastic Filter Screen into Screw Cap and
Use diverted water for gardens.
attach the Nut and Tail.
Maintenance
Maintenance
To ensure continuing function, unscrew the screw cap on a regular
To ensure continuing function, unscrew the screw cap on a regular
basis to allow debris to fall out. Hose or wash the filter screen if
basis to allow debris to fall out. Hose or wash the filter screen if
needed and check and clean the flow control valve.
needed and check and clean the flow control valve.

90MM FIRST FLUSH DIVERTER – DOWNPIPE DOWNPIPE DIVERTER

A simple First Flush Diverter requiring minimal
The Marley Downpipe Diverter can be installed
maintenance.
easily to Marley PVC downpipes allowing
Can be installed to a new or existing downpipe collection of fresh rainwater for tank filling,
system. Use a Marley adaptor to install with a 65mm garden watering, etc.
or 80mm downpipe system (RA65.90 or RA80.90). The Downpipe Diverter is especially useful for
Add the appropriate length of 90mm diameter pipe to suit the those wishing to reduce dependence on reticulated water.
quantity of water you wish to divert. The Downpipe Diverter should not be used in a ‘wet system’.
Installation Instructions Dimensions - 80mm pipe that can easily be adapted to fit all
Step 1 - Determine the length of the Diverter Chamber (cut 90mm Marley downpipe profiles.
pipe as long as possible) making sure the Screw Cap is at least Installation Instructions
150mm from the ground to allow for removal and cleaning.
Cut a 320mm gap in the downpipe, join the Downpipe Diverter to
the enclosed attachment.
Water flow Water flow
from roof from roof Attach the Diverter to the downpipe, starting at the top with the
Tee Junction
diverter offset slightly, then push up and across.

To tank Let the Diverter then slide down into the downpipe.
To tank

Ball Seat To Use - Simply lower the side arm and ensure it is clipped in and
Flexible system setup
on a downwards slope.
To Diverter
Chamber Sealing Ball

Diverter Chamber
Diverter Chamber

Filter Screen

Socket
‘O’ Ring Seal
Flow Control Valve Socket
Screw Cap
Flow Control Valve
LEAF DIVERTERS

Leaf and debris diversion rainheads should be fitted where water LEAF BEATER - for low rainfall areas
is captured for storage in tanks or as a debris removing device in
A high performance rain head with a 4mm
areas on reticulated water.
aperture adjustable elliptical primary screen.
As the water flows from the spouting it brings the small pieces of Sheds leaves from the gutter onto the ground.
debris with it and as water washes over the angle screen of the Comes complete with an integrated directional
leaf diversion system the debris is forced away and the water gutter outlet and an insect proof stainless steel
continues through the screen. low flow rate secondary screen. For midmounting
remove the top directional outlet. Bevel the entry downpipe at
LEAF SLIDE 60º and allow 50mm clearance between the pipe and screen.
The leafslide has been designed for ease of Dimensions - 280mm in length, 210mm wide and 180mm in depth.
installation. The filter box has anchor tabs provided
for screwing or nailing it to the wall or fascia. The LEAF CATCHER - gutter or wall mounted
leafslide has a standard 90mm stormwater outlet
A budget leaf and debris catcher with two
which is easily adapted to fit Marley downpipe.
horizontal internal screens.
Best performance is achieved by using 65mm diameter downpipe Screen one: 6mm aperture screen
above the filter screen. Screen two: 0.955mm stainless steel insect
Dimensions - 280mm in length. The top of the Leafslide is 120mm proof screen.
by 100mm deep. Cleaning - Simply lift the screen out and empty
and replace when cleaned. Perfect for low rain fall, low leaf areas
LEAF EATER - for high rainfall areas where tank water is required. Fits both 90 and 100mm PVC pipe.
The ultimate high performance rainhead for use Dimensions - 210mm in length, 290mm wide and 190 mm in depth.
in heavy rainfall areas. Primary screen of 6mm
aperture and an insect proof secondary stainless TANK VACUUM KIT
steel screen of 0.995mm.
Fine sediment, which can contain harmful
To install mount the main box evenly under the bacteria and heavy metals, eventually builds up
gutter outlet or expansion outlet by securing it to the fascia with in the bottom of the tank and some can find its
pop rivets or screws, making sure the backing plate fits snugly up way out the outtake pipe and into the home and
to the bottom edge of the gutter but not between the fascia and can be ingested. This can be removed by using a
back of the gutter. tank vacuum kit.
Place the insect screen in the main box over the outlet ensuring
How the Tank Vacuum System Works
that the screen clips into place. Replace the primary screen, making
sure the screen fits inside the front lip of the Leaf Eater®, and Water flows into the tank through your existing pipework. The 90mm
secure in place with the clips provided. The Leaf Eater® is now ready diameter Tank Vacuum Kit becomes charged with water and a suction
for connection to the downpipe. Do not glue the Leaf Eater® to the action starts as the excess water exits the tank. This exiting water
down pipe. Secure downpipe with a screw for easy replacement. sucks the sediment/waste from the bottom of the tank (from the
“Anaerobic Zone” - dirty zone) up the syphon pipe and out the tank.
Dimensions - 290mm in length, 270 wide and 190mm in depth
Position the tank vacuum kit directly over the outtake. Cut the vacuum
pipe so that the serrated pick up rests on the bottom of the tank. The
anti syphon feature prevents all the water in the tank from syphoning.

DISCLAIMER AUCKLAND
This technical brochure has been compiled by Marley New Zealand Limited (“The Company”) to promote better understanding of the technical
aspects of the Company’s products to assist users in obtaining from them the best possible performance.
Mahia Road, Manurewa, Private Bag 802 Manurewa
The technical brochure is supplied subject to acknowledgment of the following conditions: Sales Department: Telephone 09 279 2777
The technical brochure is protected by Copyright and may not be copied or reproduced in any form or by any means in whole or in part without Direct Fax 09 279 2778 Freefax 0800 652 621
prior consent in writing by the Company.
Product specifications, usage data and advisory information may change from time to time with advances in research and field experience. The
Head Office: Telephone 09 279 2799 Fax 09 279 2798
Company reserves the right to make such changes at any time without notice. Sales Hotline: 0800 222 922
Correct usage of the Company’s products involve engineering judgements which cannot be properly made without full knowledge of all the condi-
tions pertaining to each specific installation. The Company expressly disclaims all and any liability to any person whether supplied with this pub- CHRISTCHURCH
lication or not in respect of anything and of the consequences of anything done or omitted to be done by any such person in reliance whether Shands Road, Hornby, PO Box 16233 Christchurch
whole or partial upon the whole or any part of the contents of this publication.
No offer to trade, nor any conditions of trading, are expressed or implied by the issue or content of this manual.
Sales Hotline: 0800 222 922
Nothing herein shall override the Company’s Conditions of Sale, which may be obtained from the Registered Office or any Sales Office of the For a quotation, installation or more information call free
Company.
This technical brochure is and shall remain the property of the Company, and shall be surrendered on demand to the Company. 0800 MARLEY (0800 627 539)

For further information: 0800 MARLEY (0800 627 539) www.marley.co.nz

Rainwater Solutions