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SYSTEM OVERVIEW
APPLICATION
Marley New Zealand Limited uPVC spouting and downpipe systems are designed for the collection and discharge
of rainwater from roof areas. Marley uPVC spouting and downpipe systems are suitable ONLY as external spouting
and downpipes and are NOT suitable for use as a concealed system.
• Marley spouting systems should not be installed as an internal spouting system.
• Marley downpipe systems should not be installed in wall or ceiling cavities.
NON STANDARD APPLICATION USE
If Marley uPVC spouting and downpipe systems are to be used in any applications not covered by the current
Marley literature, written confirmation of suitability should be obtained from Marley.
DURABILITY
Marley uPVC spouting and downpipe systems are suitable as external spouting and downpipes exceeding the minimum
five years durability requirements of the New Zealand Building Code clause B2/AS1 table 1. With correct installation
and maintenance, Marley uPVC spouting and downpipe systems will perform well in excess of the 15 year guarantee
period. A regular cleaning programme is essential to maintain the performance and appearance of the system.
ENVIRONMENTAL
Marley operates recycling programs with industry partners where uPVC pipes are returned from site for recycling on
Marley’s premises. All Marley manufactured uPVC spouting and downpipe systems are 100% recyclable. Marley uPVC
spouting and downpipe systems are suitable for most environmental conditions and will never rust, rot or corrode.
QUALITY ACCREDITATION
Marley operates Quality and Environmental Management Systems that are registered by Telarc SAI as complying
with ISO 9001 : 2008 Telarc Registration 678 and ISO 14001 : 2004 Telarc Registration 78.
DESIGN DETAILS
FLOW CHARACTERISTICS
Marley uPVC spouting and downpipe systems have been designed to optimise the discharge of water. Selection of
profile and downpipe size is dependent upon the roof catchment area and the rainfall intensity for the region where
the product is being installed. Applying fall to the spouting improves the flow and the location of the outlets can also
influence the flow. The New Zealand Building Code Approved Document E1 references downpipes and spouting in
the Acceptable Solution E1/AS1 Clauses 4.0 and 5.0. More detailed spouting design can be found in AS/NZS3500.3
WET SYSTEM – HEAD PRESSURE
When downpipes are holding water for a prolonged period of time and are therefore subjected to head pressure
(e.g. water tank connection or downpipe installed horizontally), ONLY round downpipes are suitable. Care should
be taken to ensure that all joints are sealed properly using Marley MCS solvent. Marley does not recommend uPVC
downpipes be buried, instead Stormwater/DWV pipe should be used for this application.
WATER COLLECTION – DRINKING WATER
All Marley uPVC spouting and downpipe systems are suitable for the collection of rainwater for drinking purposes.
Marley uPVC spouting and downpipe systems as well as Marley stormwater / DWV pipe and fittings have been
tested and comply with, AS/NZS 4020:2005: Testing of products for use in contact with drinking water. As
spouting and downpipes form only part of a complete rainwater collection system, care should be taken to ensure
water is not contaminated by other sources.
WEATHERING
Over time the components of the Marley spouting and downpipe system will weather, as is customary with all
exterior pigmented finishes. The weathering will not affect the long- term durability of the system. The rate at
which fading occurs will be dependent on the environmental conditions the product is exposed to, including
UV levels, pollution and building orientation.
FABRICATION
Marley’s fabrication services can provide assistance with special part requirements for the completion of your
project. Items, such as those described below, can be fabricated to the required dimensions:
• Special angle flat • Special angle rake
• Special outlet • Special adaptor
SNOW LOADING / WIND EFFECT
Marley recommends reducing the bracket spacing to 300mm for areas subjected to high wind or occasional snow
falls. Marley uPVC spouting systems are NOT recommended for HEAVY snow fall areas.