Maximum flow performances.
Valsir Rainplus represents the most advanced technology in the construction sector and in the drainage of rainwater from roofs of medium and large size buildings.
Maximum performances, money saving and sustainability in one system.
The best solution in case of rain
The Rainplus systems uses the building height as driving force which, combined with the effect of negative pressure, allows high-speed flow rates to be reached thus maximizing drainage efficiency. Rainplus allows the entire flow of water to be directed to any part of the building, thus enabling the rainwater harvesting systems to be installed, as required by the Green Building Program.
The Rainplus siphonic drainage systems is made up of special outlets that are patented, designed and tested to American Standard ASME A112.6.9 and European Standard EN 1253 and connected to HDPE high-density polyethylene pipes.
The outlets also incorporate special components that allow installation on any type of roof and waterproofing sheet.
Cost-saving when compared with conventional systems with a reduction in pipe diameters and outlets
Self-cleaning of pipes, thanks to high drainage speed and total filling
Sustainability, thanks to the redirection of rainwater allowing it to be reused
Greater design flexibility and freedom in the definition and planning of the system
Greater installation speed and reduced digging work
Conventional systems VS. Rainplus system
Conventional drainage system
A conventional drainage system can be designed for large surface areas but does not cut off air flow into the pipe. For this reason pipes are sized for filling ratios of 20% or 33% (depending on national or local standards and regulations) allowing considerable amounts of air into the pipes of 80% or 67% of the pipe section.
The Rainplus siphonic drainage systemThe Rainplus siphonic drainage systems is made up of special outlets that incorporate an anti-vortex plate that prevents air from entering into the pipes. The outlets are connected via short pipes of relatively small diameters to the horizontal water collector which is located just under the building roof.
Flow stages of Rainplus systems
With a moderate flow of 10% or 15% of the design rainfall intensity value
When the water discharged from the roof is between 10% to 15% and 60% of the full bore flow condition
When the water discharged is between 60% and 95% of the design rainfall intensity value
When the flow is over 95% of the design rainfall intensity value, the siphonic effect operates at full capacity reaching maximum velocity with no air entering the pipes
RAINPLUS® drainage systems, how does it work?
OUTLETS AND ACCESSORIES
One of the key elements of the system is the Rainplus outlet that has been designed and manufactured to meet the requirements and testing criteria set by the international standards EN 1253 and ASME A112.6.9.
KIT OVERFLOW RAINPLUS
Local regulations or standards on the design of rainwater systems may require emergency systems (also known as overflow systems) to be provided that are capable of draining unexpectedly intense rainfall that exceeds the design rainfall level.
Valsir offers a wide range of bracketing systems and accessories for installing the entire drainage network. The Rainplus bracketing system, composed of special clips together with support rails and relative accessories, is designed to resist the forces of heat contraction and expansion in the drainage network and is available in ∅40 mm up to ∅315 mm
PIPES AND FITTINGS
The Valsir HDPE product line for the creation of siphonic drainage systems is available in ∅40 mm up to ∅315 mm
Types of installation
One system, different types of installation
Installation in a metallic gutter by welding
Installation in a metallic gutter by rivets
Installation with plastic waterproofing membrane
Installation with bituminous waterproofing membrane